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Finding the Fourth Proportional to 487,763.60, 735,301.30 and 455,250.20

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Solution

The fourth proportional to 487,763.60, 735,301.30 and 455,250.20 is: 686,287.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,763.60 : 735,301.30 = 455,250.20 : x
  2. Step 2: Convert to fraction form
    487,763.60/735,301.30 = 455,250.20/x
  3. Step 3: Cross multiply
    487,763.60x = 735,301.30 × 455,250.20
  4. Step 4: Simplify right side
    487,763.60x = 334,746,063,885.26
  5. Step 5: Solve for x
    x = 334,746,063,885.26/487,763.60
  6. Step 6: Final answer
    x = 686,287.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.