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Finding the Fourth Proportional to 1,767.51, 2,439.02 and 981.51

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Solution

The fourth proportional to 1,767.51, 2,439.02 and 981.51 is: 1,354.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,767.51 : 2,439.02 = 981.51 : x
  2. Step 2: Convert to fraction form
    1,767.51/2,439.02 = 981.51/x
  3. Step 3: Cross multiply
    1,767.51x = 2,439.02 × 981.51
  4. Step 4: Simplify right side
    1,767.51x = 2,393,917.61
  5. Step 5: Solve for x
    x = 2,393,917.61/1,767.51
  6. Step 6: Final answer
    x = 1,354.40

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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.