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Finding the Fourth Proportional to 1,009.49, 1,513.17 and 392.93

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Solution

The fourth proportional to 1,009.49, 1,513.17 and 392.93 is: 588.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.49 : 1,513.17 = 392.93 : x
  2. Step 2: Convert to fraction form
    1,009.49/1,513.17 = 392.93/x
  3. Step 3: Cross multiply
    1,009.49x = 1,513.17 × 392.93
  4. Step 4: Simplify right side
    1,009.49x = 594,569.89
  5. Step 5: Solve for x
    x = 594,569.89/1,009.49
  6. Step 6: Final answer
    x = 588.98

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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.