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Finding the Fourth Proportional to 339,689.76, 509,534.04 and 90,371.76

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Solution

The fourth proportional to 339,689.76, 509,534.04 and 90,371.76 is: 135,557.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,689.76 : 509,534.04 = 90,371.76 : x
  2. Step 2: Convert to fraction form
    339,689.76/509,534.04 = 90,371.76/x
  3. Step 3: Cross multiply
    339,689.76x = 509,534.04 × 90,371.76
  4. Step 4: Simplify right side
    339,689.76x = 46,047,487,974.71
  5. Step 5: Solve for x
    x = 46,047,487,974.71/339,689.76
  6. Step 6: Final answer
    x = 135,557.48

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1.5x scale

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.