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Finding the Fourth Proportional to 1,842.70, 2,543.00 and 1,056.90

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Solution

The fourth proportional to 1,842.70, 2,543.00 and 1,056.90 is: 1,458.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,842.70 : 2,543.00 = 1,056.90 : x
  2. Step 2: Convert to fraction form
    1,842.70/2,543.00 = 1,056.90/x
  3. Step 3: Cross multiply
    1,842.70x = 2,543.00 × 1,056.90
  4. Step 4: Simplify right side
    1,842.70x = 2,687,681.34
  5. Step 5: Solve for x
    x = 2,687,681.34/1,842.70
  6. Step 6: Final answer
    x = 1,458.56

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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.