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Finding the Fourth Proportional to 758,978.80, 1,139,780.40 and 404,684.80

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Solution

The fourth proportional to 758,978.80, 1,139,780.40 and 404,684.80 is: 607,726.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    758,978.80 : 1,139,780.40 = 404,684.80 : x
  2. Step 2: Convert to fraction form
    758,978.80/1,139,780.40 = 404,684.80/x
  3. Step 3: Cross multiply
    758,978.80x = 1,139,780.40 × 404,684.80
  4. Step 4: Simplify right side
    758,978.80x = 461,251,803,217.92
  5. Step 5: Solve for x
    x = 461,251,803,217.92/758,978.80
  6. Step 6: Final answer
    x = 607,726.86

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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.