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Finding the Fourth Proportional to 877.47, 1,210.92 and 484.48

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Solution

The fourth proportional to 877.47, 1,210.92 and 484.48 is: 668.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.47 : 1,210.92 = 484.48 : x
  2. Step 2: Convert to fraction form
    877.47/1,210.92 = 484.48/x
  3. Step 3: Cross multiply
    877.47x = 1,210.92 × 484.48
  4. Step 4: Simplify right side
    877.47x = 586,666.52
  5. Step 5: Solve for x
    x = 586,666.52/877.47
  6. Step 6: Final answer
    x = 668.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.