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Finding the Fourth Proportional to 1,570.68, 2,167.47 and 862.50

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Solution

The fourth proportional to 1,570.68, 2,167.47 and 862.50 is: 1,190.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.68 : 2,167.47 = 862.50 : x
  2. Step 2: Convert to fraction form
    1,570.68/2,167.47 = 862.50/x
  3. Step 3: Cross multiply
    1,570.68x = 2,167.47 × 862.50
  4. Step 4: Simplify right side
    1,570.68x = 1,869,442.88
  5. Step 5: Solve for x
    x = 1,869,442.88/1,570.68
  6. Step 6: Final answer
    x = 1,190.21

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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.