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Finding the Fourth Proportional to 903.71, 1,247.65 and 572.42

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Solution

The fourth proportional to 903.71, 1,247.65 and 572.42 is: 790.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.71 : 1,247.65 = 572.42 : x
  2. Step 2: Convert to fraction form
    903.71/1,247.65 = 572.42/x
  3. Step 3: Cross multiply
    903.71x = 1,247.65 × 572.42
  4. Step 4: Simplify right side
    903.71x = 714,173.57
  5. Step 5: Solve for x
    x = 714,173.57/903.71
  6. Step 6: Final answer
    x = 790.27

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.