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Finding the Fourth Proportional to 672,909.57, 928,508.67 and 400,970.70

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Solution

The fourth proportional to 672,909.57, 928,508.67 and 400,970.70 is: 553,276.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,909.57 : 928,508.67 = 400,970.70 : x
  2. Step 2: Convert to fraction form
    672,909.57/928,508.67 = 400,970.70/x
  3. Step 3: Cross multiply
    672,909.57x = 928,508.67 × 400,970.70
  4. Step 4: Simplify right side
    672,909.57x = 372,304,771,365.97
  5. Step 5: Solve for x
    x = 372,304,771,365.97/672,909.57
  6. Step 6: Final answer
    x = 553,276.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.