Home / 1,545.10-2,131.47-1,013.74

Finding the Fourth Proportional to 1,545.10, 2,131.47 and 1,013.74

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Solution

The fourth proportional to 1,545.10, 2,131.47 and 1,013.74 is: 1,398.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.10 : 2,131.47 = 1,013.74 : x
  2. Step 2: Convert to fraction form
    1,545.10/2,131.47 = 1,013.74/x
  3. Step 3: Cross multiply
    1,545.10x = 2,131.47 × 1,013.74
  4. Step 4: Simplify right side
    1,545.10x = 2,160,756.40
  5. Step 5: Solve for x
    x = 2,160,756.40/1,545.10
  6. Step 6: Final answer
    x = 1,398.46

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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.