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Finding the Fourth Proportional to 612,057.70, 918,086.55 and 493,959.70

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Solution

The fourth proportional to 612,057.70, 918,086.55 and 493,959.70 is: 740,939.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,057.70 : 918,086.55 = 493,959.70 : x
  2. Step 2: Convert to fraction form
    612,057.70/918,086.55 = 493,959.70/x
  3. Step 3: Cross multiply
    612,057.70x = 918,086.55 × 493,959.70
  4. Step 4: Simplify right side
    612,057.70x = 453,497,756,812.04
  5. Step 5: Solve for x
    x = 453,497,756,812.04/612,057.70
  6. Step 6: Final answer
    x = 740,939.55

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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.