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Finding the Fourth Proportional to 659,218.80, 988,828.20 and 456,265.20

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Solution

The fourth proportional to 659,218.80, 988,828.20 and 456,265.20 is: 684,397.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,218.80 : 988,828.20 = 456,265.20 : x
  2. Step 2: Convert to fraction form
    659,218.80/988,828.20 = 456,265.20/x
  3. Step 3: Cross multiply
    659,218.80x = 988,828.20 × 456,265.20
  4. Step 4: Simplify right side
    659,218.80x = 451,167,896,438.64
  5. Step 5: Solve for x
    x = 451,167,896,438.64/659,218.80
  6. Step 6: Final answer
    x = 684,397.80

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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.