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Finding the Fourth Proportional to 372,916.60, 559,374.90 and 215,015.20

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Solution

The fourth proportional to 372,916.60, 559,374.90 and 215,015.20 is: 322,522.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,916.60 : 559,374.90 = 215,015.20 : x
  2. Step 2: Convert to fraction form
    372,916.60/559,374.90 = 215,015.20/x
  3. Step 3: Cross multiply
    372,916.60x = 559,374.90 × 215,015.20
  4. Step 4: Simplify right side
    372,916.60x = 120,274,105,998.48
  5. Step 5: Solve for x
    x = 120,274,105,998.48/372,916.60
  6. Step 6: Final answer
    x = 322,522.80

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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.