Home / 1,386,090.96-1,912,821.48-813,140.88

Finding the Fourth Proportional to 1,386,090.96, 1,912,821.48 and 813,140.88

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Solution

The fourth proportional to 1,386,090.96, 1,912,821.48 and 813,140.88 is: 1,122,143.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,090.96 : 1,912,821.48 = 813,140.88 : x
  2. Step 2: Convert to fraction form
    1,386,090.96/1,912,821.48 = 813,140.88/x
  3. Step 3: Cross multiply
    1,386,090.96x = 1,912,821.48 × 813,140.88
  4. Step 4: Simplify right side
    1,386,090.96x = 1,555,393,341,530.10
  5. Step 5: Solve for x
    x = 1,555,393,341,530.10/1,386,090.96
  6. Step 6: Final answer
    x = 1,122,143.77

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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.