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Finding the Fourth Proportional to 318,916.20, 478,374.30 and 230,998.80

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Solution

The fourth proportional to 318,916.20, 478,374.30 and 230,998.80 is: 346,498.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,916.20 : 478,374.30 = 230,998.80 : x
  2. Step 2: Convert to fraction form
    318,916.20/478,374.30 = 230,998.80/x
  3. Step 3: Cross multiply
    318,916.20x = 478,374.30 × 230,998.80
  4. Step 4: Simplify right side
    318,916.20x = 110,503,889,250.84
  5. Step 5: Solve for x
    x = 110,503,889,250.84/318,916.20
  6. Step 6: Final answer
    x = 346,498.20

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1.5x scale

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.