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Finding the Fourth Proportional to 659,219.80, 988,829.70 and 456,266.20

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Solution

The fourth proportional to 659,219.80, 988,829.70 and 456,266.20 is: 684,399.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,219.80 : 988,829.70 = 456,266.20 : x
  2. Step 2: Convert to fraction form
    659,219.80/988,829.70 = 456,266.20/x
  3. Step 3: Cross multiply
    659,219.80x = 988,829.70 × 456,266.20
  4. Step 4: Simplify right side
    659,219.80x = 451,169,569,666.14
  5. Step 5: Solve for x
    x = 451,169,569,666.14/659,219.80
  6. Step 6: Final answer
    x = 684,399.30

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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.