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Finding the Fourth Proportional to 1,006.97, 1,389.51 and 581.57

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Solution

The fourth proportional to 1,006.97, 1,389.51 and 581.57 is: 802.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.97 : 1,389.51 = 581.57 : x
  2. Step 2: Convert to fraction form
    1,006.97/1,389.51 = 581.57/x
  3. Step 3: Cross multiply
    1,006.97x = 1,389.51 × 581.57
  4. Step 4: Simplify right side
    1,006.97x = 808,097.33
  5. Step 5: Solve for x
    x = 808,097.33/1,006.97
  6. Step 6: Final answer
    x = 802.50

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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.