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Finding the Fourth Proportional to 687,245.88, 948,431.24 and 429,275.56

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Solution

The fourth proportional to 687,245.88, 948,431.24 and 429,275.56 is: 592,420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,245.88 : 948,431.24 = 429,275.56 : x
  2. Step 2: Convert to fraction form
    687,245.88/948,431.24 = 429,275.56/x
  3. Step 3: Cross multiply
    687,245.88x = 948,431.24 × 429,275.56
  4. Step 4: Simplify right side
    687,245.88x = 407,138,351,672.49
  5. Step 5: Solve for x
    x = 407,138,351,672.49/687,245.88
  6. Step 6: Final answer
    x = 592,420.21

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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.