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Finding the Fourth Proportional to 648.82, 895.68 and 400.35

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Solution

The fourth proportional to 648.82, 895.68 and 400.35 is: 552.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.82 : 895.68 = 400.35 : x
  2. Step 2: Convert to fraction form
    648.82/895.68 = 400.35/x
  3. Step 3: Cross multiply
    648.82x = 895.68 × 400.35
  4. Step 4: Simplify right side
    648.82x = 358,585.49
  5. Step 5: Solve for x
    x = 358,585.49/648.82
  6. Step 6: Final answer
    x = 552.67

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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.