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Finding the Fourth Proportional to 942.67, 1,300.34 and 690.22

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Solution

The fourth proportional to 942.67, 1,300.34 and 690.22 is: 952.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.67 : 1,300.34 = 690.22 : x
  2. Step 2: Convert to fraction form
    942.67/1,300.34 = 690.22/x
  3. Step 3: Cross multiply
    942.67x = 1,300.34 × 690.22
  4. Step 4: Simplify right side
    942.67x = 897,510.72
  5. Step 5: Solve for x
    x = 897,510.72/942.67
  6. Step 6: Final answer
    x = 952.10

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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.