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Finding the Fourth Proportional to 265,780.80, 398,671.20 and 133,070.40

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Solution

The fourth proportional to 265,780.80, 398,671.20 and 133,070.40 is: 199,605.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,780.80 : 398,671.20 = 133,070.40 : x
  2. Step 2: Convert to fraction form
    265,780.80/398,671.20 = 133,070.40/x
  3. Step 3: Cross multiply
    265,780.80x = 398,671.20 × 133,070.40
  4. Step 4: Simplify right side
    265,780.80x = 53,051,336,052.48
  5. Step 5: Solve for x
    x = 53,051,336,052.48/265,780.80
  6. Step 6: Final answer
    x = 199,605.60

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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.