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Finding the Fourth Proportional to 659.97, 987.93 and 556.56

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Solution

The fourth proportional to 659.97, 987.93 and 556.56 is: 833.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.97 : 987.93 = 556.56 : x
  2. Step 2: Convert to fraction form
    659.97/987.93 = 556.56/x
  3. Step 3: Cross multiply
    659.97x = 987.93 × 556.56
  4. Step 4: Simplify right side
    659.97x = 549,842.32
  5. Step 5: Solve for x
    x = 549,842.32/659.97
  6. Step 6: Final answer
    x = 833.13

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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.