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Finding the Fourth Proportional to 942.32, 1,300.40 and 522.74

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Solution

The fourth proportional to 942.32, 1,300.40 and 522.74 is: 721.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.32 : 1,300.40 = 522.74 : x
  2. Step 2: Convert to fraction form
    942.32/1,300.40 = 522.74/x
  3. Step 3: Cross multiply
    942.32x = 1,300.40 × 522.74
  4. Step 4: Simplify right side
    942.32x = 679,761.98
  5. Step 5: Solve for x
    x = 679,761.98/942.32
  6. Step 6: Final answer
    x = 721.37

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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.