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Finding the Fourth Proportional to 285,995.18, 428,995.61 and 86,317.22

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Solution

The fourth proportional to 285,995.18, 428,995.61 and 86,317.22 is: 129,476.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,995.18 : 428,995.61 = 86,317.22 : x
  2. Step 2: Convert to fraction form
    285,995.18/428,995.61 = 86,317.22/x
  3. Step 3: Cross multiply
    285,995.18x = 428,995.61 × 86,317.22
  4. Step 4: Simplify right side
    285,995.18x = 37,029,708,447.40
  5. Step 5: Solve for x
    x = 37,029,708,447.40/285,995.18
  6. Step 6: Final answer
    x = 129,476.69

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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.