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Finding the Fourth Proportional to 911,487.70, 1,257,866.18 and 503,598.97

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Solution

The fourth proportional to 911,487.70, 1,257,866.18 and 503,598.97 is: 694,973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,487.70 : 1,257,866.18 = 503,598.97 : x
  2. Step 2: Convert to fraction form
    911,487.70/1,257,866.18 = 503,598.97/x
  3. Step 3: Cross multiply
    911,487.70x = 1,257,866.18 × 503,598.97
  4. Step 4: Simplify right side
    911,487.70x = 633,460,112,645.84
  5. Step 5: Solve for x
    x = 633,460,112,645.84/911,487.70
  6. Step 6: Final answer
    x = 694,973.85

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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.