Home / 1,048.12-1,572.20-317.70

Finding the Fourth Proportional to 1,048.12, 1,572.20 and 317.70

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Solution

The fourth proportional to 1,048.12, 1,572.20 and 317.70 is: 476.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.12 : 1,572.20 = 317.70 : x
  2. Step 2: Convert to fraction form
    1,048.12/1,572.20 = 317.70/x
  3. Step 3: Cross multiply
    1,048.12x = 1,572.20 × 317.70
  4. Step 4: Simplify right side
    1,048.12x = 499,487.94
  5. Step 5: Solve for x
    x = 499,487.94/1,048.12
  6. Step 6: Final answer
    x = 476.56

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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.