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Finding the Fourth Proportional to 1,256.18, 1,733.10 and 814.20

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Solution

The fourth proportional to 1,256.18, 1,733.10 and 814.20 is: 1,123.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.18 : 1,733.10 = 814.20 : x
  2. Step 2: Convert to fraction form
    1,256.18/1,733.10 = 814.20/x
  3. Step 3: Cross multiply
    1,256.18x = 1,733.10 × 814.20
  4. Step 4: Simplify right side
    1,256.18x = 1,411,090.02
  5. Step 5: Solve for x
    x = 1,411,090.02/1,256.18
  6. Step 6: Final answer
    x = 1,123.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.