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Finding the Fourth Proportional to 1,038.67, 1,433.34 and 572.92

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Solution

The fourth proportional to 1,038.67, 1,433.34 and 572.92 is: 790.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.67 : 1,433.34 = 572.92 : x
  2. Step 2: Convert to fraction form
    1,038.67/1,433.34 = 572.92/x
  3. Step 3: Cross multiply
    1,038.67x = 1,433.34 × 572.92
  4. Step 4: Simplify right side
    1,038.67x = 821,185.57
  5. Step 5: Solve for x
    x = 821,185.57/1,038.67
  6. Step 6: Final answer
    x = 790.61

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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.