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Finding the Fourth Proportional to 876.72, 1,210.45 and 562.11

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Solution

The fourth proportional to 876.72, 1,210.45 and 562.11 is: 776.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.72 : 1,210.45 = 562.11 : x
  2. Step 2: Convert to fraction form
    876.72/1,210.45 = 562.11/x
  3. Step 3: Cross multiply
    876.72x = 1,210.45 × 562.11
  4. Step 4: Simplify right side
    876.72x = 680,412.95
  5. Step 5: Solve for x
    x = 680,412.95/876.72
  6. Step 6: Final answer
    x = 776.09

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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.