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Finding the Fourth Proportional to 913.83, 1,370.89 and 503.16

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Solution

The fourth proportional to 913.83, 1,370.89 and 503.16 is: 754.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.83 : 1,370.89 = 503.16 : x
  2. Step 2: Convert to fraction form
    913.83/1,370.89 = 503.16/x
  3. Step 3: Cross multiply
    913.83x = 1,370.89 × 503.16
  4. Step 4: Simplify right side
    913.83x = 689,777.01
  5. Step 5: Solve for x
    x = 689,777.01/913.83
  6. Step 6: Final answer
    x = 754.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.