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Finding the Fourth Proportional to 4,988.40, 6,881.40 and 4,055.28

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Solution

The fourth proportional to 4,988.40, 6,881.40 and 4,055.28 is: 5,594.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,988.40 : 6,881.40 = 4,055.28 : x
  2. Step 2: Convert to fraction form
    4,988.40/6,881.40 = 4,055.28/x
  3. Step 3: Cross multiply
    4,988.40x = 6,881.40 × 4,055.28
  4. Step 4: Simplify right side
    4,988.40x = 27,906,003.79
  5. Step 5: Solve for x
    x = 27,906,003.79/4,988.40
  6. Step 6: Final answer
    x = 5,594.18

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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.