Home / 1,315.03-1,972.55-545.47

Finding the Fourth Proportional to 1,315.03, 1,972.55 and 545.47

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Solution

The fourth proportional to 1,315.03, 1,972.55 and 545.47 is: 818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.03 : 1,972.55 = 545.47 : x
  2. Step 2: Convert to fraction form
    1,315.03/1,972.55 = 545.47/x
  3. Step 3: Cross multiply
    1,315.03x = 1,972.55 × 545.47
  4. Step 4: Simplify right side
    1,315.03x = 1,075,966.85
  5. Step 5: Solve for x
    x = 1,075,966.85/1,315.03
  6. Step 6: Final answer
    x = 818.21

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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.