Home / 999,742.34-1,378,209.12-712,764.20

Finding the Fourth Proportional to 999,742.34, 1,378,209.12 and 712,764.20

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Solution

The fourth proportional to 999,742.34, 1,378,209.12 and 712,764.20 is: 982,591.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,742.34 : 1,378,209.12 = 712,764.20 : x
  2. Step 2: Convert to fraction form
    999,742.34/1,378,209.12 = 712,764.20/x
  3. Step 3: Cross multiply
    999,742.34x = 1,378,209.12 × 712,764.20
  4. Step 4: Simplify right side
    999,742.34x = 982,338,120,849.50
  5. Step 5: Solve for x
    x = 982,338,120,849.50/999,742.34
  6. Step 6: Final answer
    x = 982,591.30

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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.