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Finding the Fourth Proportional to 648,081.30, 972,121.95 and 368,145.30

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Solution

The fourth proportional to 648,081.30, 972,121.95 and 368,145.30 is: 552,217.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,081.30 : 972,121.95 = 368,145.30 : x
  2. Step 2: Convert to fraction form
    648,081.30/972,121.95 = 368,145.30/x
  3. Step 3: Cross multiply
    648,081.30x = 972,121.95 × 368,145.30
  4. Step 4: Simplify right side
    648,081.30x = 357,882,126,919.34
  5. Step 5: Solve for x
    x = 357,882,126,919.34/648,081.30
  6. Step 6: Final answer
    x = 552,217.95

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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.