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Finding the Fourth Proportional to 648.93, 895.17 and 400.31

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Solution

The fourth proportional to 648.93, 895.17 and 400.31 is: 552.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.93 : 895.17 = 400.31 : x
  2. Step 2: Convert to fraction form
    648.93/895.17 = 400.31/x
  3. Step 3: Cross multiply
    648.93x = 895.17 × 400.31
  4. Step 4: Simplify right side
    648.93x = 358,345.50
  5. Step 5: Solve for x
    x = 358,345.50/648.93
  6. Step 6: Final answer
    x = 552.21

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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.