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Finding the Fourth Proportional to 840.84, 1,160.28 and 467.79

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Solution

The fourth proportional to 840.84, 1,160.28 and 467.79 is: 645.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.84 : 1,160.28 = 467.79 : x
  2. Step 2: Convert to fraction form
    840.84/1,160.28 = 467.79/x
  3. Step 3: Cross multiply
    840.84x = 1,160.28 × 467.79
  4. Step 4: Simplify right side
    840.84x = 542,767.38
  5. Step 5: Solve for x
    x = 542,767.38/840.84
  6. Step 6: Final answer
    x = 645.51

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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.