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Finding the Fourth Proportional to 526,780, 726,724.74 and 308,877.45

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Solution

The fourth proportional to 526,780, 726,724.74 and 308,877.45 is: 426,115.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,780 : 726,724.74 = 308,877.45 : x
  2. Step 2: Convert to fraction form
    526,780/726,724.74 = 308,877.45/x
  3. Step 3: Cross multiply
    526,780x = 726,724.74 × 308,877.45
  4. Step 4: Simplify right side
    526,780x = 224,468,884,543.11
  5. Step 5: Solve for x
    x = 224,468,884,543.11/526,780
  6. Step 6: Final answer
    x = 426,115.05

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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.