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Finding the Fourth Proportional to 880.55, 1,214.76 and 618.72

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Solution

The fourth proportional to 880.55, 1,214.76 and 618.72 is: 853.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.55 : 1,214.76 = 618.72 : x
  2. Step 2: Convert to fraction form
    880.55/1,214.76 = 618.72/x
  3. Step 3: Cross multiply
    880.55x = 1,214.76 × 618.72
  4. Step 4: Simplify right side
    880.55x = 751,587.14
  5. Step 5: Solve for x
    x = 751,587.14/880.55
  6. Step 6: Final answer
    x = 853.54

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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.