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Finding the Fourth Proportional to 291,637.20, 437,916.60 and 213,301.20

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Solution

The fourth proportional to 291,637.20, 437,916.60 and 213,301.20 is: 320,288.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,637.20 : 437,916.60 = 213,301.20 : x
  2. Step 2: Convert to fraction form
    291,637.20/437,916.60 = 213,301.20/x
  3. Step 3: Cross multiply
    291,637.20x = 437,916.60 × 213,301.20
  4. Step 4: Simplify right side
    291,637.20x = 93,408,136,279.92
  5. Step 5: Solve for x
    x = 93,408,136,279.92/291,637.20
  6. Step 6: Final answer
    x = 320,288.83

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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.