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Finding the Fourth Proportional to 660,689.70, 991,034.55 and 550,464.90

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Solution

The fourth proportional to 660,689.70, 991,034.55 and 550,464.90 is: 825,697.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,689.70 : 991,034.55 = 550,464.90 : x
  2. Step 2: Convert to fraction form
    660,689.70/991,034.55 = 550,464.90/x
  3. Step 3: Cross multiply
    660,689.70x = 991,034.55 × 550,464.90
  4. Step 4: Simplify right side
    660,689.70x = 545,529,734,462.30
  5. Step 5: Solve for x
    x = 545,529,734,462.30/660,689.70
  6. Step 6: Final answer
    x = 825,697.35

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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.