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Finding the Fourth Proportional to 827.65, 1,142.16 and 454.62

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Solution

The fourth proportional to 827.65, 1,142.16 and 454.62 is: 627.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.65 : 1,142.16 = 454.62 : x
  2. Step 2: Convert to fraction form
    827.65/1,142.16 = 454.62/x
  3. Step 3: Cross multiply
    827.65x = 1,142.16 × 454.62
  4. Step 4: Simplify right side
    827.65x = 519,246.51
  5. Step 5: Solve for x
    x = 519,246.51/827.65
  6. Step 6: Final answer
    x = 627.38

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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.