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Finding the Fourth Proportional to 911,165.10, 1,257,299.95 and 503,242.66

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Solution

The fourth proportional to 911,165.10, 1,257,299.95 and 503,242.66 is: 694,415.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,165.10 : 1,257,299.95 = 503,242.66 : x
  2. Step 2: Convert to fraction form
    911,165.10/1,257,299.95 = 503,242.66/x
  3. Step 3: Cross multiply
    911,165.10x = 1,257,299.95 × 503,242.66
  4. Step 4: Simplify right side
    911,165.10x = 632,726,971,255.87
  5. Step 5: Solve for x
    x = 632,726,971,255.87/911,165.10
  6. Step 6: Final answer
    x = 694,415.28

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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.