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Finding the Fourth Proportional to 309,985.92, 427,780.34 and 174,020.13

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Solution

The fourth proportional to 309,985.92, 427,780.34 and 174,020.13 is: 240,147.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,985.92 : 427,780.34 = 174,020.13 : x
  2. Step 2: Convert to fraction form
    309,985.92/427,780.34 = 174,020.13/x
  3. Step 3: Cross multiply
    309,985.92x = 427,780.34 × 174,020.13
  4. Step 4: Simplify right side
    309,985.92x = 74,442,390,160.72
  5. Step 5: Solve for x
    x = 74,442,390,160.72/309,985.92
  6. Step 6: Final answer
    x = 240,147.65

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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.