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Finding the Fourth Proportional to 613,281.20, 919,921.80 and 558,168.80

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Solution

The fourth proportional to 613,281.20, 919,921.80 and 558,168.80 is: 837,253.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,281.20 : 919,921.80 = 558,168.80 : x
  2. Step 2: Convert to fraction form
    613,281.20/919,921.80 = 558,168.80/x
  3. Step 3: Cross multiply
    613,281.20x = 919,921.80 × 558,168.80
  4. Step 4: Simplify right side
    613,281.20x = 513,471,647,199.84
  5. Step 5: Solve for x
    x = 513,471,647,199.84/613,281.20
  6. Step 6: Final answer
    x = 837,253.20

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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.