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Finding the Fourth Proportional to 839.35, 1,259.23 and 291.52

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Solution

The fourth proportional to 839.35, 1,259.23 and 291.52 is: 437.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.35 : 1,259.23 = 291.52 : x
  2. Step 2: Convert to fraction form
    839.35/1,259.23 = 291.52/x
  3. Step 3: Cross multiply
    839.35x = 1,259.23 × 291.52
  4. Step 4: Simplify right side
    839.35x = 367,090.73
  5. Step 5: Solve for x
    x = 367,090.73/839.35
  6. Step 6: Final answer
    x = 437.35

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1.5x scale

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.