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Finding the Fourth Proportional to 520,083.10, 780,124.65 and 488,590.30

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Solution

The fourth proportional to 520,083.10, 780,124.65 and 488,590.30 is: 732,885.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,083.10 : 780,124.65 = 488,590.30 : x
  2. Step 2: Convert to fraction form
    520,083.10/780,124.65 = 488,590.30/x
  3. Step 3: Cross multiply
    520,083.10x = 780,124.65 × 488,590.30
  4. Step 4: Simplify right side
    520,083.10x = 381,161,336,780.90
  5. Step 5: Solve for x
    x = 381,161,336,780.90/520,083.10
  6. Step 6: Final answer
    x = 732,885.45

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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.