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Finding the Fourth Proportional to 671,934.72, 927,232.20 and 385,428

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Solution

The fourth proportional to 671,934.72, 927,232.20 and 385,428 is: 531,869.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,934.72 : 927,232.20 = 385,428 : x
  2. Step 2: Convert to fraction form
    671,934.72/927,232.20 = 385,428/x
  3. Step 3: Cross multiply
    671,934.72x = 927,232.20 × 385,428
  4. Step 4: Simplify right side
    671,934.72x = 357,381,252,381.60
  5. Step 5: Solve for x
    x = 357,381,252,381.60/671,934.72
  6. Step 6: Final answer
    x = 531,869.01

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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.