Home / 1,487.30-2,229.59-621.14

Finding the Fourth Proportional to 1,487.30, 2,229.59 and 621.14

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Solution

The fourth proportional to 1,487.30, 2,229.59 and 621.14 is: 931.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.30 : 2,229.59 = 621.14 : x
  2. Step 2: Convert to fraction form
    1,487.30/2,229.59 = 621.14/x
  3. Step 3: Cross multiply
    1,487.30x = 2,229.59 × 621.14
  4. Step 4: Simplify right side
    1,487.30x = 1,384,877.94
  5. Step 5: Solve for x
    x = 1,384,877.94/1,487.30
  6. Step 6: Final answer
    x = 931.14

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1.5x scale

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.