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Finding the Fourth Proportional to 1,127,951.90, 1,687,974.03 and 808,455.90

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Solution

The fourth proportional to 1,127,951.90, 1,687,974.03 and 808,455.90 is: 1,209,849.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127,951.90 : 1,687,974.03 = 808,455.90 : x
  2. Step 2: Convert to fraction form
    1,127,951.90/1,687,974.03 = 808,455.90/x
  3. Step 3: Cross multiply
    1,127,951.90x = 1,687,974.03 × 808,455.90
  4. Step 4: Simplify right side
    1,127,951.90x = 1,364,652,563,600.28
  5. Step 5: Solve for x
    x = 1,364,652,563,600.28/1,127,951.90
  6. Step 6: Final answer
    x = 1,209,849.96

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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.