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Finding the Fourth Proportional to 1,557.32, 2,335.70 and 517.34

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Solution

The fourth proportional to 1,557.32, 2,335.70 and 517.34 is: 775.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.32 : 2,335.70 = 517.34 : x
  2. Step 2: Convert to fraction form
    1,557.32/2,335.70 = 517.34/x
  3. Step 3: Cross multiply
    1,557.32x = 2,335.70 × 517.34
  4. Step 4: Simplify right side
    1,557.32x = 1,208,351.04
  5. Step 5: Solve for x
    x = 1,208,351.04/1,557.32
  6. Step 6: Final answer
    x = 775.92

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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.