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Finding the Fourth Proportional to 1,572.50, 2,358.38 and 647.14

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Solution

The fourth proportional to 1,572.50, 2,358.38 and 647.14 is: 970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.50 : 2,358.38 = 647.14 : x
  2. Step 2: Convert to fraction form
    1,572.50/2,358.38 = 647.14/x
  3. Step 3: Cross multiply
    1,572.50x = 2,358.38 × 647.14
  4. Step 4: Simplify right side
    1,572.50x = 1,526,202.03
  5. Step 5: Solve for x
    x = 1,526,202.03/1,572.50
  6. Step 6: Final answer
    x = 970.56

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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.