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Finding the Fourth Proportional to 985,602.80, 1,478,404.20 and 513,210.80

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Solution

The fourth proportional to 985,602.80, 1,478,404.20 and 513,210.80 is: 769,816.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,602.80 : 1,478,404.20 = 513,210.80 : x
  2. Step 2: Convert to fraction form
    985,602.80/1,478,404.20 = 513,210.80/x
  3. Step 3: Cross multiply
    985,602.80x = 1,478,404.20 × 513,210.80
  4. Step 4: Simplify right side
    985,602.80x = 758,733,002,205.36
  5. Step 5: Solve for x
    x = 758,733,002,205.36/985,602.80
  6. Step 6: Final answer
    x = 769,816.20

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.