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Finding the Fourth Proportional to 649.08, 895.79 and 400.40

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Solution

The fourth proportional to 649.08, 895.79 and 400.40 is: 552.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.08 : 895.79 = 400.40 : x
  2. Step 2: Convert to fraction form
    649.08/895.79 = 400.40/x
  3. Step 3: Cross multiply
    649.08x = 895.79 × 400.40
  4. Step 4: Simplify right side
    649.08x = 358,674.20
  5. Step 5: Solve for x
    x = 358,674.20/649.08
  6. Step 6: Final answer
    x = 552.59

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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.