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Finding the Fourth Proportional to 1,575.79, 2,364.90 and 651.79

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Solution

The fourth proportional to 1,575.79, 2,364.90 and 651.79 is: 978.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.79 : 2,364.90 = 651.79 : x
  2. Step 2: Convert to fraction form
    1,575.79/2,364.90 = 651.79/x
  3. Step 3: Cross multiply
    1,575.79x = 2,364.90 × 651.79
  4. Step 4: Simplify right side
    1,575.79x = 1,541,418.17
  5. Step 5: Solve for x
    x = 1,541,418.17/1,575.79
  6. Step 6: Final answer
    x = 978.19

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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.