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Finding the Fourth Proportional to 933.40, 1,288.16 and 560.39

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Solution

The fourth proportional to 933.40, 1,288.16 and 560.39 is: 773.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.40 : 1,288.16 = 560.39 : x
  2. Step 2: Convert to fraction form
    933.40/1,288.16 = 560.39/x
  3. Step 3: Cross multiply
    933.40x = 1,288.16 × 560.39
  4. Step 4: Simplify right side
    933.40x = 721,871.98
  5. Step 5: Solve for x
    x = 721,871.98/933.40
  6. Step 6: Final answer
    x = 773.38

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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.