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Finding the Fourth Proportional to 659,425.40, 989,138.10 and 655,488.80

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Solution

The fourth proportional to 659,425.40, 989,138.10 and 655,488.80 is: 983,233.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,425.40 : 989,138.10 = 655,488.80 : x
  2. Step 2: Convert to fraction form
    659,425.40/989,138.10 = 655,488.80/x
  3. Step 3: Cross multiply
    659,425.40x = 989,138.10 × 655,488.80
  4. Step 4: Simplify right side
    659,425.40x = 648,368,946,203.28
  5. Step 5: Solve for x
    x = 648,368,946,203.28/659,425.40
  6. Step 6: Final answer
    x = 983,233.20

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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.