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Finding the Fourth Proportional to 1,320,875.76, 1,822,815.71 and 748,027.56

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Solution

The fourth proportional to 1,320,875.76, 1,822,815.71 and 748,027.56 is: 1,032,282.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,875.76 : 1,822,815.71 = 748,027.56 : x
  2. Step 2: Convert to fraction form
    1,320,875.76/1,822,815.71 = 748,027.56/x
  3. Step 3: Cross multiply
    1,320,875.76x = 1,822,815.71 × 748,027.56
  4. Step 4: Simplify right side
    1,320,875.76x = 1,363,516,375,026.75
  5. Step 5: Solve for x
    x = 1,363,516,375,026.75/1,320,875.76
  6. Step 6: Final answer
    x = 1,032,282.08

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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.