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Finding the Fourth Proportional to 285,986.71, 428,983.13 and 86,308.89

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Solution

The fourth proportional to 285,986.71, 428,983.13 and 86,308.89 is: 129,464.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,986.71 : 428,983.13 = 86,308.89 : x
  2. Step 2: Convert to fraction form
    285,986.71/428,983.13 = 86,308.89/x
  3. Step 3: Cross multiply
    285,986.71x = 428,983.13 × 86,308.89
  4. Step 4: Simplify right side
    285,986.71x = 37,025,057,779.03
  5. Step 5: Solve for x
    x = 37,025,057,779.03/285,986.71
  6. Step 6: Final answer
    x = 129,464.26

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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.