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Finding the Fourth Proportional to 664,561.38, 916,821.66 and 492,901.70

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Solution

The fourth proportional to 664,561.38, 916,821.66 and 492,901.70 is: 680,001.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,561.38 : 916,821.66 = 492,901.70 : x
  2. Step 2: Convert to fraction form
    664,561.38/916,821.66 = 492,901.70/x
  3. Step 3: Cross multiply
    664,561.38x = 916,821.66 × 492,901.70
  4. Step 4: Simplify right side
    664,561.38x = 451,902,950,226.71
  5. Step 5: Solve for x
    x = 451,902,950,226.71/664,561.38
  6. Step 6: Final answer
    x = 680,001.82

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.