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Finding the Fourth Proportional to 839.55, 1,259.05 and 352.51

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Solution

The fourth proportional to 839.55, 1,259.05 and 352.51 is: 528.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.55 : 1,259.05 = 352.51 : x
  2. Step 2: Convert to fraction form
    839.55/1,259.05 = 352.51/x
  3. Step 3: Cross multiply
    839.55x = 1,259.05 × 352.51
  4. Step 4: Simplify right side
    839.55x = 443,827.72
  5. Step 5: Solve for x
    x = 443,827.72/839.55
  6. Step 6: Final answer
    x = 528.65

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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.