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Finding the Fourth Proportional to 657,989.70, 985,672.35 and 377,178.90

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Solution

The fourth proportional to 657,989.70, 985,672.35 and 377,178.90 is: 565,016.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,989.70 : 985,672.35 = 377,178.90 : x
  2. Step 2: Convert to fraction form
    657,989.70/985,672.35 = 377,178.90/x
  3. Step 3: Cross multiply
    657,989.70x = 985,672.35 × 377,178.90
  4. Step 4: Simplify right side
    657,989.70x = 371,774,812,733.42
  5. Step 5: Solve for x
    x = 371,774,812,733.42/657,989.70
  6. Step 6: Final answer
    x = 565,016.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.