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Finding the Fourth Proportional to 385,444.60, 578,166.90 and 104,961.40

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Solution

The fourth proportional to 385,444.60, 578,166.90 and 104,961.40 is: 157,442.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,444.60 : 578,166.90 = 104,961.40 : x
  2. Step 2: Convert to fraction form
    385,444.60/578,166.90 = 104,961.40/x
  3. Step 3: Cross multiply
    385,444.60x = 578,166.90 × 104,961.40
  4. Step 4: Simplify right side
    385,444.60x = 60,685,207,257.66
  5. Step 5: Solve for x
    x = 60,685,207,257.66/385,444.60
  6. Step 6: Final answer
    x = 157,442.10

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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.