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Finding the Fourth Proportional to 385,374.10, 578,061.15 and 104,890.90

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Solution

The fourth proportional to 385,374.10, 578,061.15 and 104,890.90 is: 157,336.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,374.10 : 578,061.15 = 104,890.90 : x
  2. Step 2: Convert to fraction form
    385,374.10/578,061.15 = 104,890.90/x
  3. Step 3: Cross multiply
    385,374.10x = 578,061.15 × 104,890.90
  4. Step 4: Simplify right side
    385,374.10x = 60,633,354,278.54
  5. Step 5: Solve for x
    x = 60,633,354,278.54/385,374.10
  6. Step 6: Final answer
    x = 157,336.35

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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.