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Finding the Fourth Proportional to 955.40, 1,320.16 and 746.10

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Solution

The fourth proportional to 955.40, 1,320.16 and 746.10 is: 1,030.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.40 : 1,320.16 = 746.10 : x
  2. Step 2: Convert to fraction form
    955.40/1,320.16 = 746.10/x
  3. Step 3: Cross multiply
    955.40x = 1,320.16 × 746.10
  4. Step 4: Simplify right side
    955.40x = 984,971.38
  5. Step 5: Solve for x
    x = 984,971.38/955.40
  6. Step 6: Final answer
    x = 1,030.95

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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.