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Finding the Fourth Proportional to 612,077.55, 918,116.33 and 280,301.55

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Solution

The fourth proportional to 612,077.55, 918,116.33 and 280,301.55 is: 420,452.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,077.55 : 918,116.33 = 280,301.55 : x
  2. Step 2: Convert to fraction form
    612,077.55/918,116.33 = 280,301.55/x
  3. Step 3: Cross multiply
    612,077.55x = 918,116.33 × 280,301.55
  4. Step 4: Simplify right side
    612,077.55x = 257,349,428,977.80
  5. Step 5: Solve for x
    x = 257,349,428,977.80/612,077.55
  6. Step 6: Final answer
    x = 420,452.33

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Double scale
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Similar ratio
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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.