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Finding the Fourth Proportional to 838.19, 1,256.20 and 632.18

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Solution

The fourth proportional to 838.19, 1,256.20 and 632.18 is: 947.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.19 : 1,256.20 = 632.18 : x
  2. Step 2: Convert to fraction form
    838.19/1,256.20 = 632.18/x
  3. Step 3: Cross multiply
    838.19x = 1,256.20 × 632.18
  4. Step 4: Simplify right side
    838.19x = 794,146.08
  5. Step 5: Solve for x
    x = 794,146.08/838.19
  6. Step 6: Final answer
    x = 947.45

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Double scale
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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.