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Finding the Fourth Proportional to 1,575.15, 2,362.38 and 479.30

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Solution

The fourth proportional to 1,575.15, 2,362.38 and 479.30 is: 718.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.15 : 2,362.38 = 479.30 : x
  2. Step 2: Convert to fraction form
    1,575.15/2,362.38 = 479.30/x
  3. Step 3: Cross multiply
    1,575.15x = 2,362.38 × 479.30
  4. Step 4: Simplify right side
    1,575.15x = 1,132,276.92
  5. Step 5: Solve for x
    x = 1,132,276.92/1,575.15
  6. Step 6: Final answer
    x = 718.84

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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.