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Finding the Fourth Proportional to 287,641.12, 431,656.08 and 100,654.24

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Solution

The fourth proportional to 287,641.12, 431,656.08 and 100,654.24 is: 151,049.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,641.12 : 431,656.08 = 100,654.24 : x
  2. Step 2: Convert to fraction form
    287,641.12/431,656.08 = 100,654.24/x
  3. Step 3: Cross multiply
    287,641.12x = 431,656.08 × 100,654.24
  4. Step 4: Simplify right side
    287,641.12x = 43,448,014,673.78
  5. Step 5: Solve for x
    x = 43,448,014,673.78/287,641.12
  6. Step 6: Final answer
    x = 151,049.39

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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.