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Finding the Fourth Proportional to 1,343.61, 2,015.43 and 477.93

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Solution

The fourth proportional to 1,343.61, 2,015.43 and 477.93 is: 716.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.61 : 2,015.43 = 477.93 : x
  2. Step 2: Convert to fraction form
    1,343.61/2,015.43 = 477.93/x
  3. Step 3: Cross multiply
    1,343.61x = 2,015.43 × 477.93
  4. Step 4: Simplify right side
    1,343.61x = 963,234.46
  5. Step 5: Solve for x
    x = 963,234.46/1,343.61
  6. Step 6: Final answer
    x = 716.90

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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.