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Finding the Fourth Proportional to 659,628.30, 989,442.45 and 447,051.90

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Solution

The fourth proportional to 659,628.30, 989,442.45 and 447,051.90 is: 670,577.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,628.30 : 989,442.45 = 447,051.90 : x
  2. Step 2: Convert to fraction form
    659,628.30/989,442.45 = 447,051.90/x
  3. Step 3: Cross multiply
    659,628.30x = 989,442.45 × 447,051.90
  4. Step 4: Simplify right side
    659,628.30x = 442,332,127,213.16
  5. Step 5: Solve for x
    x = 442,332,127,213.16/659,628.30
  6. Step 6: Final answer
    x = 670,577.85

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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.