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Finding the Fourth Proportional to 933.61, 1,290.18 and 756.22

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Solution

The fourth proportional to 933.61, 1,290.18 and 756.22 is: 1,045.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.61 : 1,290.18 = 756.22 : x
  2. Step 2: Convert to fraction form
    933.61/1,290.18 = 756.22/x
  3. Step 3: Cross multiply
    933.61x = 1,290.18 × 756.22
  4. Step 4: Simplify right side
    933.61x = 975,659.92
  5. Step 5: Solve for x
    x = 975,659.92/933.61
  6. Step 6: Final answer
    x = 1,045.04

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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.