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Finding the Fourth Proportional to 659,611.30, 989,416.95 and 379,675.30

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Solution

The fourth proportional to 659,611.30, 989,416.95 and 379,675.30 is: 569,512.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,611.30 : 989,416.95 = 379,675.30 : x
  2. Step 2: Convert to fraction form
    659,611.30/989,416.95 = 379,675.30/x
  3. Step 3: Cross multiply
    659,611.30x = 989,416.95 × 379,675.30
  4. Step 4: Simplify right side
    659,611.30x = 375,657,177,316.34
  5. Step 5: Solve for x
    x = 375,657,177,316.34/659,611.30
  6. Step 6: Final answer
    x = 569,512.95

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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.