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Finding the Fourth Proportional to 880.50, 1,215.72 and 714.45

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Solution

The fourth proportional to 880.50, 1,215.72 and 714.45 is: 986.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.50 : 1,215.72 = 714.45 : x
  2. Step 2: Convert to fraction form
    880.50/1,215.72 = 714.45/x
  3. Step 3: Cross multiply
    880.50x = 1,215.72 × 714.45
  4. Step 4: Simplify right side
    880.50x = 868,571.15
  5. Step 5: Solve for x
    x = 868,571.15/880.50
  6. Step 6: Final answer
    x = 986.45

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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.