Home / 1,913.16-2,869.87-614.55

Finding the Fourth Proportional to 1,913.16, 2,869.87 and 614.55

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Solution

The fourth proportional to 1,913.16, 2,869.87 and 614.55 is: 921.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.16 : 2,869.87 = 614.55 : x
  2. Step 2: Convert to fraction form
    1,913.16/2,869.87 = 614.55/x
  3. Step 3: Cross multiply
    1,913.16x = 2,869.87 × 614.55
  4. Step 4: Simplify right side
    1,913.16x = 1,763,678.61
  5. Step 5: Solve for x
    x = 1,763,678.61/1,913.16
  6. Step 6: Final answer
    x = 921.87

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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.