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Finding the Fourth Proportional to 687,468.25, 948,712.67 and 385,668.73

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Solution

The fourth proportional to 687,468.25, 948,712.67 and 385,668.73 is: 532,226.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,468.25 : 948,712.67 = 385,668.73 : x
  2. Step 2: Convert to fraction form
    687,468.25/948,712.67 = 385,668.73/x
  3. Step 3: Cross multiply
    687,468.25x = 948,712.67 × 385,668.73
  4. Step 4: Simplify right side
    687,468.25x = 365,888,808,645.47
  5. Step 5: Solve for x
    x = 365,888,808,645.47/687,468.25
  6. Step 6: Final answer
    x = 532,226.48

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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.