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Finding the Fourth Proportional to 265,886.04, 398,906.82 and 78,902.40

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Solution

The fourth proportional to 265,886.04, 398,906.82 and 78,902.40 is: 118,376.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,886.04 : 398,906.82 = 78,902.40 : x
  2. Step 2: Convert to fraction form
    265,886.04/398,906.82 = 78,902.40/x
  3. Step 3: Cross multiply
    265,886.04x = 398,906.82 × 78,902.40
  4. Step 4: Simplify right side
    265,886.04x = 31,474,705,474.37
  5. Step 5: Solve for x
    x = 31,474,705,474.37/265,886.04
  6. Step 6: Final answer
    x = 118,376.68

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1.5x scale

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.