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Finding the Fourth Proportional to 942.24, 1,300.37 and 522.72

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Solution

The fourth proportional to 942.24, 1,300.37 and 522.72 is: 721.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.24 : 1,300.37 = 522.72 : x
  2. Step 2: Convert to fraction form
    942.24/1,300.37 = 522.72/x
  3. Step 3: Cross multiply
    942.24x = 1,300.37 × 522.72
  4. Step 4: Simplify right side
    942.24x = 679,726.79
  5. Step 5: Solve for x
    x = 679,726.79/942.24
  6. Step 6: Final answer
    x = 721.39

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Double scale
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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.