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Finding the Fourth Proportional to 487,907.10, 731,860.65 and 172,395.90

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Solution

The fourth proportional to 487,907.10, 731,860.65 and 172,395.90 is: 258,593.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,907.10 : 731,860.65 = 172,395.90 : x
  2. Step 2: Convert to fraction form
    487,907.10/731,860.65 = 172,395.90/x
  3. Step 3: Cross multiply
    487,907.10x = 731,860.65 × 172,395.90
  4. Step 4: Simplify right side
    487,907.10x = 126,169,775,431.34
  5. Step 5: Solve for x
    x = 126,169,775,431.34/487,907.10
  6. Step 6: Final answer
    x = 258,593.85

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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.