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Finding the Fourth Proportional to 876.23, 1,209.20 and 483.24

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Solution

The fourth proportional to 876.23, 1,209.20 and 483.24 is: 666.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.23 : 1,209.20 = 483.24 : x
  2. Step 2: Convert to fraction form
    876.23/1,209.20 = 483.24/x
  3. Step 3: Cross multiply
    876.23x = 1,209.20 × 483.24
  4. Step 4: Simplify right side
    876.23x = 584,333.81
  5. Step 5: Solve for x
    x = 584,333.81/876.23
  6. Step 6: Final answer
    x = 666.87

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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.