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Finding the Fourth Proportional to 520,048.10, 780,072.15 and 425,569.70

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Solution

The fourth proportional to 520,048.10, 780,072.15 and 425,569.70 is: 638,354.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,048.10 : 780,072.15 = 425,569.70 : x
  2. Step 2: Convert to fraction form
    520,048.10/780,072.15 = 425,569.70/x
  3. Step 3: Cross multiply
    520,048.10x = 780,072.15 × 425,569.70
  4. Step 4: Simplify right side
    520,048.10x = 331,975,070,853.86
  5. Step 5: Solve for x
    x = 331,975,070,853.86/520,048.10
  6. Step 6: Final answer
    x = 638,354.55

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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.