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Finding the Fourth Proportional to 287,585.60, 431,054.40 and 137,897.60

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Solution

The fourth proportional to 287,585.60, 431,054.40 and 137,897.60 is: 206,691.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,585.60 : 431,054.40 = 137,897.60 : x
  2. Step 2: Convert to fraction form
    287,585.60/431,054.40 = 137,897.60/x
  3. Step 3: Cross multiply
    287,585.60x = 431,054.40 × 137,897.60
  4. Step 4: Simplify right side
    287,585.60x = 59,441,367,229.44
  5. Step 5: Solve for x
    x = 59,441,367,229.44/287,585.60
  6. Step 6: Final answer
    x = 206,691.04

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1.5x scale

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.