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Finding the Fourth Proportional to 2,291.16, 3,437.39 and 647.72

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Solution

The fourth proportional to 2,291.16, 3,437.39 and 647.72 is: 971.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.16 : 3,437.39 = 647.72 : x
  2. Step 2: Convert to fraction form
    2,291.16/3,437.39 = 647.72/x
  3. Step 3: Cross multiply
    2,291.16x = 3,437.39 × 647.72
  4. Step 4: Simplify right side
    2,291.16x = 2,226,445.83
  5. Step 5: Solve for x
    x = 2,226,445.83/2,291.16
  6. Step 6: Final answer
    x = 971.75

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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.