Home / 1,125,158.72-1,687,438.22-315,498.51

Finding the Fourth Proportional to 1,125,158.72, 1,687,438.22 and 315,498.51

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Solution

The fourth proportional to 1,125,158.72, 1,687,438.22 and 315,498.51 is: 473,163.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125,158.72 : 1,687,438.22 = 315,498.51 : x
  2. Step 2: Convert to fraction form
    1,125,158.72/1,687,438.22 = 315,498.51/x
  3. Step 3: Cross multiply
    1,125,158.72x = 1,687,438.22 × 315,498.51
  4. Step 4: Simplify right side
    1,125,158.72x = 532,384,242,549.56
  5. Step 5: Solve for x
    x = 532,384,242,549.56/1,125,158.72
  6. Step 6: Final answer
    x = 473,163.68

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.