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Finding the Fourth Proportional to 1,047.27, 1,445.21 and 581.51

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Solution

The fourth proportional to 1,047.27, 1,445.21 and 581.51 is: 802.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.27 : 1,445.21 = 581.51 : x
  2. Step 2: Convert to fraction form
    1,047.27/1,445.21 = 581.51/x
  3. Step 3: Cross multiply
    1,047.27x = 1,445.21 × 581.51
  4. Step 4: Simplify right side
    1,047.27x = 840,404.07
  5. Step 5: Solve for x
    x = 840,404.07/1,047.27
  6. Step 6: Final answer
    x = 802.47

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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.