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Finding the Fourth Proportional to 687,246.88, 948,432.62 and 429,276.56

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Solution

The fourth proportional to 687,246.88, 948,432.62 and 429,276.56 is: 592,421.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,246.88 : 948,432.62 = 429,276.56 : x
  2. Step 2: Convert to fraction form
    687,246.88/948,432.62 = 429,276.56/x
  3. Step 3: Cross multiply
    687,246.88x = 948,432.62 × 429,276.56
  4. Step 4: Simplify right side
    687,246.88x = 407,139,892,505.39
  5. Step 5: Solve for x
    x = 407,139,892,505.39/687,246.88
  6. Step 6: Final answer
    x = 592,421.59

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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.