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Finding the Fourth Proportional to 315,035.80, 472,553.70 and 287,479.60

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Solution

The fourth proportional to 315,035.80, 472,553.70 and 287,479.60 is: 431,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,035.80 : 472,553.70 = 287,479.60 : x
  2. Step 2: Convert to fraction form
    315,035.80/472,553.70 = 287,479.60/x
  3. Step 3: Cross multiply
    315,035.80x = 472,553.70 × 287,479.60
  4. Step 4: Simplify right side
    315,035.80x = 135,849,548,654.52
  5. Step 5: Solve for x
    x = 135,849,548,654.52/315,035.80
  6. Step 6: Final answer
    x = 431,219.40

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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.