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Finding the Fourth Proportional to 659,602.80, 989,404.20 and 379,666.80

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Solution

The fourth proportional to 659,602.80, 989,404.20 and 379,666.80 is: 569,500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,602.80 : 989,404.20 = 379,666.80 : x
  2. Step 2: Convert to fraction form
    659,602.80/989,404.20 = 379,666.80/x
  3. Step 3: Cross multiply
    659,602.80x = 989,404.20 × 379,666.80
  4. Step 4: Simplify right side
    659,602.80x = 375,643,926,520.56
  5. Step 5: Solve for x
    x = 375,643,926,520.56/659,602.80
  6. Step 6: Final answer
    x = 569,500.20

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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.