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Finding the Fourth Proportional to 643,967.60, 965,951.40 and 455,010.80

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Solution

The fourth proportional to 643,967.60, 965,951.40 and 455,010.80 is: 682,516.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,967.60 : 965,951.40 = 455,010.80 : x
  2. Step 2: Convert to fraction form
    643,967.60/965,951.40 = 455,010.80/x
  3. Step 3: Cross multiply
    643,967.60x = 965,951.40 × 455,010.80
  4. Step 4: Simplify right side
    643,967.60x = 439,518,319,275.12
  5. Step 5: Solve for x
    x = 439,518,319,275.12/643,967.60
  6. Step 6: Final answer
    x = 682,516.20

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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.