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Finding the Fourth Proportional to 339,305.74, 508,985.31 and 89,987.74

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Solution

The fourth proportional to 339,305.74, 508,985.31 and 89,987.74 is: 134,988.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,305.74 : 508,985.31 = 89,987.74 : x
  2. Step 2: Convert to fraction form
    339,305.74/508,985.31 = 89,987.74/x
  3. Step 3: Cross multiply
    339,305.74x = 508,985.31 × 89,987.74
  4. Step 4: Simplify right side
    339,305.74x = 45,802,437,740.10
  5. Step 5: Solve for x
    x = 45,802,437,740.10/339,305.74
  6. Step 6: Final answer
    x = 134,988.69

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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.