Home / 1,299.52-1,948.70-477.20

Finding the Fourth Proportional to 1,299.52, 1,948.70 and 477.20

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Solution

The fourth proportional to 1,299.52, 1,948.70 and 477.20 is: 715.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.52 : 1,948.70 = 477.20 : x
  2. Step 2: Convert to fraction form
    1,299.52/1,948.70 = 477.20/x
  3. Step 3: Cross multiply
    1,299.52x = 1,948.70 × 477.20
  4. Step 4: Simplify right side
    1,299.52x = 929,919.64
  5. Step 5: Solve for x
    x = 929,919.64/1,299.52
  6. Step 6: Final answer
    x = 715.59

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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.