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Finding the Fourth Proportional to 659,423.40, 989,135.10 and 655,486.80

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Solution

The fourth proportional to 659,423.40, 989,135.10 and 655,486.80 is: 983,230.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,423.40 : 989,135.10 = 655,486.80 : x
  2. Step 2: Convert to fraction form
    659,423.40/989,135.10 = 655,486.80/x
  3. Step 3: Cross multiply
    659,423.40x = 989,135.10 × 655,486.80
  4. Step 4: Simplify right side
    659,423.40x = 648,365,001,466.68
  5. Step 5: Solve for x
    x = 648,365,001,466.68/659,423.40
  6. Step 6: Final answer
    x = 983,230.20

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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.