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Finding the Fourth Proportional to 749,411.80, 1,123,728.90 and 275,853.40

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Solution

The fourth proportional to 749,411.80, 1,123,728.90 and 275,853.40 is: 413,636.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    749,411.80 : 1,123,728.90 = 275,853.40 : x
  2. Step 2: Convert to fraction form
    749,411.80/1,123,728.90 = 275,853.40/x
  3. Step 3: Cross multiply
    749,411.80x = 1,123,728.90 × 275,853.40
  4. Step 4: Simplify right side
    749,411.80x = 309,984,437,743.26
  5. Step 5: Solve for x
    x = 309,984,437,743.26/749,411.80
  6. Step 6: Final answer
    x = 413,636.99

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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.