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Finding the Fourth Proportional to 1,326.16, 1,988.60 and 555.92

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Solution

The fourth proportional to 1,326.16, 1,988.60 and 555.92 is: 833.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.16 : 1,988.60 = 555.92 : x
  2. Step 2: Convert to fraction form
    1,326.16/1,988.60 = 555.92/x
  3. Step 3: Cross multiply
    1,326.16x = 1,988.60 × 555.92
  4. Step 4: Simplify right side
    1,326.16x = 1,105,502.51
  5. Step 5: Solve for x
    x = 1,105,502.51/1,326.16
  6. Step 6: Final answer
    x = 833.61

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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.