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Finding the Fourth Proportional to 687,468.75, 948,713.36 and 385,669.23

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Solution

The fourth proportional to 687,468.75, 948,713.36 and 385,669.23 is: 532,227.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,468.75 : 948,713.36 = 385,669.23 : x
  2. Step 2: Convert to fraction form
    687,468.75/948,713.36 = 385,669.23/x
  3. Step 3: Cross multiply
    687,468.75x = 948,713.36 × 385,669.23
  4. Step 4: Simplify right side
    687,468.75x = 365,889,549,113.57
  5. Step 5: Solve for x
    x = 365,889,549,113.57/687,468.75
  6. Step 6: Final answer
    x = 532,227.17

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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.