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Finding the Fourth Proportional to 287,385.60, 431,078.40 and 287,385.60

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Solution

The fourth proportional to 287,385.60, 431,078.40 and 287,385.60 is: 431,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,385.60 : 431,078.40 = 287,385.60 : x
  2. Step 2: Convert to fraction form
    287,385.60/431,078.40 = 287,385.60/x
  3. Step 3: Cross multiply
    287,385.60x = 431,078.40 × 287,385.60
  4. Step 4: Simplify right side
    287,385.60x = 123,885,724,631.04
  5. Step 5: Solve for x
    x = 123,885,724,631.04/287,385.60
  6. Step 6: Final answer
    x = 431,078.40

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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.