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Finding the Fourth Proportional to 659,047.20, 988,570.80 and 540,949.20

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Solution

The fourth proportional to 659,047.20, 988,570.80 and 540,949.20 is: 811,423.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,047.20 : 988,570.80 = 540,949.20 : x
  2. Step 2: Convert to fraction form
    659,047.20/988,570.80 = 540,949.20/x
  3. Step 3: Cross multiply
    659,047.20x = 988,570.80 × 540,949.20
  4. Step 4: Simplify right side
    659,047.20x = 534,766,583,403.36
  5. Step 5: Solve for x
    x = 534,766,583,403.36/659,047.20
  6. Step 6: Final answer
    x = 811,423.80

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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.