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Finding the Fourth Proportional to 217,430.60, 326,145.90 and 187,363.40

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Solution

The fourth proportional to 217,430.60, 326,145.90 and 187,363.40 is: 281,045.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,430.60 : 326,145.90 = 187,363.40 : x
  2. Step 2: Convert to fraction form
    217,430.60/326,145.90 = 187,363.40/x
  3. Step 3: Cross multiply
    217,430.60x = 326,145.90 × 187,363.40
  4. Step 4: Simplify right side
    217,430.60x = 61,107,804,720.06
  5. Step 5: Solve for x
    x = 61,107,804,720.06/217,430.60
  6. Step 6: Final answer
    x = 281,045.10

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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.