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Finding the Fourth Proportional to 265,877.40, 398,816.06 and 78,888.90

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Solution

The fourth proportional to 265,877.40, 398,816.06 and 78,888.90 is: 118,333.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,877.40 : 398,816.06 = 78,888.90 : x
  2. Step 2: Convert to fraction form
    265,877.40/398,816.06 = 78,888.90/x
  3. Step 3: Cross multiply
    265,877.40x = 398,816.06 × 78,888.90
  4. Step 4: Simplify right side
    265,877.40x = 31,462,160,275.73
  5. Step 5: Solve for x
    x = 31,462,160,275.73/265,877.40
  6. Step 6: Final answer
    x = 118,333.34

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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.