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Finding the Fourth Proportional to 867.18, 1,197.48 and 572.34

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Solution

The fourth proportional to 867.18, 1,197.48 and 572.34 is: 790.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.18 : 1,197.48 = 572.34 : x
  2. Step 2: Convert to fraction form
    867.18/1,197.48 = 572.34/x
  3. Step 3: Cross multiply
    867.18x = 1,197.48 × 572.34
  4. Step 4: Simplify right side
    867.18x = 685,365.70
  5. Step 5: Solve for x
    x = 685,365.70/867.18
  6. Step 6: Final answer
    x = 790.34

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1.5x scale

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.