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Finding the Fourth Proportional to 487,625.40, 731,438.10 and 404,681.40

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Solution

The fourth proportional to 487,625.40, 731,438.10 and 404,681.40 is: 607,022.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,625.40 : 731,438.10 = 404,681.40 : x
  2. Step 2: Convert to fraction form
    487,625.40/731,438.10 = 404,681.40/x
  3. Step 3: Cross multiply
    487,625.40x = 731,438.10 × 404,681.40
  4. Step 4: Simplify right side
    487,625.40x = 295,999,394,321.34
  5. Step 5: Solve for x
    x = 295,999,394,321.34/487,625.40
  6. Step 6: Final answer
    x = 607,022.10

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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.