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Finding the Fourth Proportional to 870.33, 1,305.49 and 437.38

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Solution

The fourth proportional to 870.33, 1,305.49 and 437.38 is: 656.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.33 : 1,305.49 = 437.38 : x
  2. Step 2: Convert to fraction form
    870.33/1,305.49 = 437.38/x
  3. Step 3: Cross multiply
    870.33x = 1,305.49 × 437.38
  4. Step 4: Simplify right side
    870.33x = 570,995.22
  5. Step 5: Solve for x
    x = 570,995.22/870.33
  6. Step 6: Final answer
    x = 656.07

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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.