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Finding the Fourth Proportional to 659,475.40, 989,213.10 and 655,538.80

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Solution

The fourth proportional to 659,475.40, 989,213.10 and 655,538.80 is: 983,308.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,475.40 : 989,213.10 = 655,538.80 : x
  2. Step 2: Convert to fraction form
    659,475.40/989,213.10 = 655,538.80/x
  3. Step 3: Cross multiply
    659,475.40x = 989,213.10 × 655,538.80
  4. Step 4: Simplify right side
    659,475.40x = 648,467,568,518.28
  5. Step 5: Solve for x
    x = 648,467,568,518.28/659,475.40
  6. Step 6: Final answer
    x = 983,308.20

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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.