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Finding the Fourth Proportional to 2,881.20, 4,312.20 and 2,017.20

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Solution

The fourth proportional to 2,881.20, 4,312.20 and 2,017.20 is: 3,019.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,881.20 : 4,312.20 = 2,017.20 : x
  2. Step 2: Convert to fraction form
    2,881.20/4,312.20 = 2,017.20/x
  3. Step 3: Cross multiply
    2,881.20x = 4,312.20 × 2,017.20
  4. Step 4: Simplify right side
    2,881.20x = 8,698,569.84
  5. Step 5: Solve for x
    x = 8,698,569.84/2,881.20
  6. Step 6: Final answer
    x = 3,019.08

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1.5x scale

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.