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Finding the Fourth Proportional to 934,318.56, 1,288,015.92 and 665,580

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Solution

The fourth proportional to 934,318.56, 1,288,015.92 and 665,580 is: 917,543.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    934,318.56 : 1,288,015.92 = 665,580 : x
  2. Step 2: Convert to fraction form
    934,318.56/1,288,015.92 = 665,580/x
  3. Step 3: Cross multiply
    934,318.56x = 1,288,015.92 × 665,580
  4. Step 4: Simplify right side
    934,318.56x = 857,277,636,033.60
  5. Step 5: Solve for x
    x = 857,277,636,033.60/934,318.56
  6. Step 6: Final answer
    x = 917,543.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.