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Finding the Fourth Proportional to 1,047.28, 1,445.18 and 581.50

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Solution

The fourth proportional to 1,047.28, 1,445.18 and 581.50 is: 802.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.28 : 1,445.18 = 581.50 : x
  2. Step 2: Convert to fraction form
    1,047.28/1,445.18 = 581.50/x
  3. Step 3: Cross multiply
    1,047.28x = 1,445.18 × 581.50
  4. Step 4: Simplify right side
    1,047.28x = 840,372.17
  5. Step 5: Solve for x
    x = 840,372.17/1,047.28
  6. Step 6: Final answer
    x = 802.43

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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.