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Finding the Fourth Proportional to 487,776.60, 731,664.90 and 207,257.40

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Solution

The fourth proportional to 487,776.60, 731,664.90 and 207,257.40 is: 310,886.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,776.60 : 731,664.90 = 207,257.40 : x
  2. Step 2: Convert to fraction form
    487,776.60/731,664.90 = 207,257.40/x
  3. Step 3: Cross multiply
    487,776.60x = 731,664.90 × 207,257.40
  4. Step 4: Simplify right side
    487,776.60x = 151,642,964,845.26
  5. Step 5: Solve for x
    x = 151,642,964,845.26/487,776.60
  6. Step 6: Final answer
    x = 310,886.10

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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.