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Finding the Fourth Proportional to 2,108.34, 3,162.40 and 647.50

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Solution

The fourth proportional to 2,108.34, 3,162.40 and 647.50 is: 971.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.34 : 3,162.40 = 647.50 : x
  2. Step 2: Convert to fraction form
    2,108.34/3,162.40 = 647.50/x
  3. Step 3: Cross multiply
    2,108.34x = 3,162.40 × 647.50
  4. Step 4: Simplify right side
    2,108.34x = 2,047,654
  5. Step 5: Solve for x
    x = 2,047,654/2,108.34
  6. Step 6: Final answer
    x = 971.22

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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.