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Finding the Fourth Proportional to 1,575.40, 2,363.13 and 479.75

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Solution

The fourth proportional to 1,575.40, 2,363.13 and 479.75 is: 719.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.40 : 2,363.13 = 479.75 : x
  2. Step 2: Convert to fraction form
    1,575.40/2,363.13 = 479.75/x
  3. Step 3: Cross multiply
    1,575.40x = 2,363.13 × 479.75
  4. Step 4: Simplify right side
    1,575.40x = 1,133,711.62
  5. Step 5: Solve for x
    x = 1,133,711.62/1,575.40
  6. Step 6: Final answer
    x = 719.64

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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.