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Finding the Fourth Proportional to 1,320,964.76, 1,823,489.40 and 891,826.16

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Solution

The fourth proportional to 1,320,964.76, 1,823,489.40 and 891,826.16 is: 1,231,096.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,964.76 : 1,823,489.40 = 891,826.16 : x
  2. Step 2: Convert to fraction form
    1,320,964.76/1,823,489.40 = 891,826.16/x
  3. Step 3: Cross multiply
    1,320,964.76x = 1,823,489.40 × 891,826.16
  4. Step 4: Simplify right side
    1,320,964.76x = 1,626,235,549,402.70
  5. Step 5: Solve for x
    x = 1,626,235,549,402.70/1,320,964.76
  6. Step 6: Final answer
    x = 1,231,096.85

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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.