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Finding the Fourth Proportional to 814.36, 1,124.46 and 553

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Solution

The fourth proportional to 814.36, 1,124.46 and 553 is: 763.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.36 : 1,124.46 = 553 : x
  2. Step 2: Convert to fraction form
    814.36/1,124.46 = 553/x
  3. Step 3: Cross multiply
    814.36x = 1,124.46 × 553
  4. Step 4: Simplify right side
    814.36x = 621,826.38
  5. Step 5: Solve for x
    x = 621,826.38/814.36
  6. Step 6: Final answer
    x = 763.58

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Double scale
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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.