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Finding the Fourth Proportional to 917,151.10, 1,375,726.65 and 618,552.70

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Solution

The fourth proportional to 917,151.10, 1,375,726.65 and 618,552.70 is: 927,829.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,151.10 : 1,375,726.65 = 618,552.70 : x
  2. Step 2: Convert to fraction form
    917,151.10/1,375,726.65 = 618,552.70/x
  3. Step 3: Cross multiply
    917,151.10x = 1,375,726.65 × 618,552.70
  4. Step 4: Simplify right side
    917,151.10x = 850,959,433,819.46
  5. Step 5: Solve for x
    x = 850,959,433,819.46/917,151.10
  6. Step 6: Final answer
    x = 927,829.05

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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.