Home / 1,287,688.57-1,777,011.36-771,742.15

Finding the Fourth Proportional to 1,287,688.57, 1,777,011.36 and 771,742.15

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Solution

The fourth proportional to 1,287,688.57, 1,777,011.36 and 771,742.15 is: 1,065,004.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,688.57 : 1,777,011.36 = 771,742.15 : x
  2. Step 2: Convert to fraction form
    1,287,688.57/1,777,011.36 = 771,742.15/x
  3. Step 3: Cross multiply
    1,287,688.57x = 1,777,011.36 × 771,742.15
  4. Step 4: Simplify right side
    1,287,688.57x = 1,371,394,560,832.56
  5. Step 5: Solve for x
    x = 1,371,394,560,832.56/1,287,688.57
  6. Step 6: Final answer
    x = 1,065,004.84

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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.