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Finding the Fourth Proportional to 933.13, 1,393.46 and 879.13

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Solution

The fourth proportional to 933.13, 1,393.46 and 879.13 is: 1,312.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.13 : 1,393.46 = 879.13 : x
  2. Step 2: Convert to fraction form
    933.13/1,393.46 = 879.13/x
  3. Step 3: Cross multiply
    933.13x = 1,393.46 × 879.13
  4. Step 4: Simplify right side
    933.13x = 1,225,032.49
  5. Step 5: Solve for x
    x = 1,225,032.49/933.13
  6. Step 6: Final answer
    x = 1,312.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.