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Finding the Fourth Proportional to 1,657.17, 2,482.31 and 780.42

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Solution

The fourth proportional to 1,657.17, 2,482.31 and 780.42 is: 1,169.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.17 : 2,482.31 = 780.42 : x
  2. Step 2: Convert to fraction form
    1,657.17/2,482.31 = 780.42/x
  3. Step 3: Cross multiply
    1,657.17x = 2,482.31 × 780.42
  4. Step 4: Simplify right side
    1,657.17x = 1,937,240.47
  5. Step 5: Solve for x
    x = 1,937,240.47/1,657.17
  6. Step 6: Final answer
    x = 1,169.01

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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.