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Finding the Fourth Proportional to 487,448.90, 731,605.35 and 287,519.30

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Solution

The fourth proportional to 487,448.90, 731,605.35 and 287,519.30 is: 431,533.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,448.90 : 731,605.35 = 287,519.30 : x
  2. Step 2: Convert to fraction form
    487,448.90/731,605.35 = 287,519.30/x
  3. Step 3: Cross multiply
    487,448.90x = 731,605.35 × 287,519.30
  4. Step 4: Simplify right side
    487,448.90x = 210,350,658,108.26
  5. Step 5: Solve for x
    x = 210,350,658,108.26/487,448.90
  6. Step 6: Final answer
    x = 431,533.76

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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.