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Finding the Fourth Proportional to 659,618.40, 989,427.60 and 580,821.60

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Solution

The fourth proportional to 659,618.40, 989,427.60 and 580,821.60 is: 871,232.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,618.40 : 989,427.60 = 580,821.60 : x
  2. Step 2: Convert to fraction form
    659,618.40/989,427.60 = 580,821.60/x
  3. Step 3: Cross multiply
    659,618.40x = 989,427.60 × 580,821.60
  4. Step 4: Simplify right side
    659,618.40x = 574,680,921,716.16
  5. Step 5: Solve for x
    x = 574,680,921,716.16/659,618.40
  6. Step 6: Final answer
    x = 871,232.40

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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.