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Finding the Fourth Proportional to 309,681.12, 464,522.28 and 85,044.48

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Solution

The fourth proportional to 309,681.12, 464,522.28 and 85,044.48 is: 127,566.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,681.12 : 464,522.28 = 85,044.48 : x
  2. Step 2: Convert to fraction form
    309,681.12/464,522.28 = 85,044.48/x
  3. Step 3: Cross multiply
    309,681.12x = 464,522.28 × 85,044.48
  4. Step 4: Simplify right side
    309,681.12x = 39,505,055,751.01
  5. Step 5: Solve for x
    x = 39,505,055,751.01/309,681.12
  6. Step 6: Final answer
    x = 127,566.88

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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.