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Finding the Fourth Proportional to 648,014.80, 972,022.20 and 448,279.60

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Solution

The fourth proportional to 648,014.80, 972,022.20 and 448,279.60 is: 672,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,014.80 : 972,022.20 = 448,279.60 : x
  2. Step 2: Convert to fraction form
    648,014.80/972,022.20 = 448,279.60/x
  3. Step 3: Cross multiply
    648,014.80x = 972,022.20 × 448,279.60
  4. Step 4: Simplify right side
    648,014.80x = 435,737,723,007.12
  5. Step 5: Solve for x
    x = 435,737,723,007.12/648,014.80
  6. Step 6: Final answer
    x = 672,419.40

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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.