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Finding the Fourth Proportional to 933.93, 1,392.19 and 917.53

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Solution

The fourth proportional to 933.93, 1,392.19 and 917.53 is: 1,367.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.93 : 1,392.19 = 917.53 : x
  2. Step 2: Convert to fraction form
    933.93/1,392.19 = 917.53/x
  3. Step 3: Cross multiply
    933.93x = 1,392.19 × 917.53
  4. Step 4: Simplify right side
    933.93x = 1,277,370.32
  5. Step 5: Solve for x
    x = 1,277,370.32/933.93
  6. Step 6: Final answer
    x = 1,367.74

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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.