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Finding the Fourth Proportional to 615,038.87, 921,753.22 and 330,396.72

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Solution

The fourth proportional to 615,038.87, 921,753.22 and 330,396.72 is: 495,162.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,038.87 : 921,753.22 = 330,396.72 : x
  2. Step 2: Convert to fraction form
    615,038.87/921,753.22 = 330,396.72/x
  3. Step 3: Cross multiply
    615,038.87x = 921,753.22 × 330,396.72
  4. Step 4: Simplify right side
    615,038.87x = 304,544,242,059.23
  5. Step 5: Solve for x
    x = 304,544,242,059.23/615,038.87
  6. Step 6: Final answer
    x = 495,162.59

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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.