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Finding the Fourth Proportional to 1,244.46, 1,714.46 and 870.78

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Solution

The fourth proportional to 1,244.46, 1,714.46 and 870.78 is: 1,199.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.46 : 1,714.46 = 870.78 : x
  2. Step 2: Convert to fraction form
    1,244.46/1,714.46 = 870.78/x
  3. Step 3: Cross multiply
    1,244.46x = 1,714.46 × 870.78
  4. Step 4: Simplify right side
    1,244.46x = 1,492,917.48
  5. Step 5: Solve for x
    x = 1,492,917.48/1,244.46
  6. Step 6: Final answer
    x = 1,199.65

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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.