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Finding the Fourth Proportional to 648,158.80, 972,238.20 and 490,694.80

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Solution

The fourth proportional to 648,158.80, 972,238.20 and 490,694.80 is: 736,042.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,158.80 : 972,238.20 = 490,694.80 : x
  2. Step 2: Convert to fraction form
    648,158.80/972,238.20 = 490,694.80/x
  3. Step 3: Cross multiply
    648,158.80x = 972,238.20 × 490,694.80
  4. Step 4: Simplify right side
    648,158.80x = 477,072,229,101.36
  5. Step 5: Solve for x
    x = 477,072,229,101.36/648,158.80
  6. Step 6: Final answer
    x = 736,042.20

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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.