Home / 427,787.90-642,312.66-238,617.88

Finding the Fourth Proportional to 427,787.90, 642,312.66 and 238,617.88

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Solution

The fourth proportional to 427,787.90, 642,312.66 and 238,617.88 is: 358,278.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,787.90 : 642,312.66 = 238,617.88 : x
  2. Step 2: Convert to fraction form
    427,787.90/642,312.66 = 238,617.88/x
  3. Step 3: Cross multiply
    427,787.90x = 642,312.66 × 238,617.88
  4. Step 4: Simplify right side
    427,787.90x = 153,267,285,226.36
  5. Step 5: Solve for x
    x = 153,267,285,226.36/427,787.90
  6. Step 6: Final answer
    x = 358,278.68

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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.