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Finding the Fourth Proportional to 659,426.80, 989,140.20 and 456,473.20

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Solution

The fourth proportional to 659,426.80, 989,140.20 and 456,473.20 is: 684,709.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,426.80 : 989,140.20 = 456,473.20 : x
  2. Step 2: Convert to fraction form
    659,426.80/989,140.20 = 456,473.20/x
  3. Step 3: Cross multiply
    659,426.80x = 989,140.20 × 456,473.20
  4. Step 4: Simplify right side
    659,426.80x = 451,515,992,342.64
  5. Step 5: Solve for x
    x = 451,515,992,342.64/659,426.80
  6. Step 6: Final answer
    x = 684,709.80

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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.