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Finding the Fourth Proportional to 877.34, 1,210.75 and 484.39

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Solution

The fourth proportional to 877.34, 1,210.75 and 484.39 is: 668.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.34 : 1,210.75 = 484.39 : x
  2. Step 2: Convert to fraction form
    877.34/1,210.75 = 484.39/x
  3. Step 3: Cross multiply
    877.34x = 1,210.75 × 484.39
  4. Step 4: Simplify right side
    877.34x = 586,470.95
  5. Step 5: Solve for x
    x = 586,470.95/877.34
  6. Step 6: Final answer
    x = 668.47

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Double scale
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1.5x scale

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.