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Finding the Fourth Proportional to 272,290.80, 408,475.08 and 85,316.88

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Solution

The fourth proportional to 272,290.80, 408,475.08 and 85,316.88 is: 127,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,290.80 : 408,475.08 = 85,316.88 : x
  2. Step 2: Convert to fraction form
    272,290.80/408,475.08 = 85,316.88/x
  3. Step 3: Cross multiply
    272,290.80x = 408,475.08 × 85,316.88
  4. Step 4: Simplify right side
    272,290.80x = 34,849,819,383.35
  5. Step 5: Solve for x
    x = 34,849,819,383.35/272,290.80
  6. Step 6: Final answer
    x = 127,987.50

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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.