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Finding the Fourth Proportional to 520,053.10, 780,079.65 and 436,072.30

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Solution

The fourth proportional to 520,053.10, 780,079.65 and 436,072.30 is: 654,108.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,053.10 : 780,079.65 = 436,072.30 : x
  2. Step 2: Convert to fraction form
    520,053.10/780,079.65 = 436,072.30/x
  3. Step 3: Cross multiply
    520,053.10x = 780,079.65 × 436,072.30
  4. Step 4: Simplify right side
    520,053.10x = 340,171,127,158.70
  5. Step 5: Solve for x
    x = 340,171,127,158.70/520,053.10
  6. Step 6: Final answer
    x = 654,108.45

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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.