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Finding the Fourth Proportional to 659,661.40, 989,492.10 and 580,864.60

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Solution

The fourth proportional to 659,661.40, 989,492.10 and 580,864.60 is: 871,296.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,661.40 : 989,492.10 = 580,864.60 : x
  2. Step 2: Convert to fraction form
    659,661.40/989,492.10 = 580,864.60/x
  3. Step 3: Cross multiply
    659,661.40x = 989,492.10 × 580,864.60
  4. Step 4: Simplify right side
    659,661.40x = 574,760,932,869.66
  5. Step 5: Solve for x
    x = 574,760,932,869.66/659,661.40
  6. Step 6: Final answer
    x = 871,296.90

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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.