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Finding the Fourth Proportional to 815.81, 1,125.47 and 535.69

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Solution

The fourth proportional to 815.81, 1,125.47 and 535.69 is: 739.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.81 : 1,125.47 = 535.69 : x
  2. Step 2: Convert to fraction form
    815.81/1,125.47 = 535.69/x
  3. Step 3: Cross multiply
    815.81x = 1,125.47 × 535.69
  4. Step 4: Simplify right side
    815.81x = 602,901.55
  5. Step 5: Solve for x
    x = 602,901.55/815.81
  6. Step 6: Final answer
    x = 739.02

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Double scale
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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.