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Finding the Fourth Proportional to 1,572.40, 2,357.05 and 695.38

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Solution

The fourth proportional to 1,572.40, 2,357.05 and 695.38 is: 1,042.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.40 : 2,357.05 = 695.38 : x
  2. Step 2: Convert to fraction form
    1,572.40/2,357.05 = 695.38/x
  3. Step 3: Cross multiply
    1,572.40x = 2,357.05 × 695.38
  4. Step 4: Simplify right side
    1,572.40x = 1,639,045.43
  5. Step 5: Solve for x
    x = 1,639,045.43/1,572.40
  6. Step 6: Final answer
    x = 1,042.38

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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.