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Finding the Fourth Proportional to 309,316.86, 426,892.68 and 173,387.52

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Solution

The fourth proportional to 309,316.86, 426,892.68 and 173,387.52 is: 239,294.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,316.86 : 426,892.68 = 173,387.52 : x
  2. Step 2: Convert to fraction form
    309,316.86/426,892.68 = 173,387.52/x
  3. Step 3: Cross multiply
    309,316.86x = 426,892.68 × 173,387.52
  4. Step 4: Simplify right side
    309,316.86x = 74,017,863,091.35
  5. Step 5: Solve for x
    x = 74,017,863,091.35/309,316.86
  6. Step 6: Final answer
    x = 239,294.63

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1.5x scale

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.