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Finding the Fourth Proportional to 616,248.80, 925,928.40 and 391,716.80

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Solution

The fourth proportional to 616,248.80, 925,928.40 and 391,716.80 is: 588,563.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,248.80 : 925,928.40 = 391,716.80 : x
  2. Step 2: Convert to fraction form
    616,248.80/925,928.40 = 391,716.80/x
  3. Step 3: Cross multiply
    616,248.80x = 925,928.40 × 391,716.80
  4. Step 4: Simplify right side
    616,248.80x = 362,701,709,877.12
  5. Step 5: Solve for x
    x = 362,701,709,877.12/616,248.80
  6. Step 6: Final answer
    x = 588,563.76

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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.