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Finding the Fourth Proportional to 265,972.80, 398,959.20 and 153,998.40

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Solution

The fourth proportional to 265,972.80, 398,959.20 and 153,998.40 is: 230,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,972.80 : 398,959.20 = 153,998.40 : x
  2. Step 2: Convert to fraction form
    265,972.80/398,959.20 = 153,998.40/x
  3. Step 3: Cross multiply
    265,972.80x = 398,959.20 × 153,998.40
  4. Step 4: Simplify right side
    265,972.80x = 61,439,078,465.28
  5. Step 5: Solve for x
    x = 61,439,078,465.28/265,972.80
  6. Step 6: Final answer
    x = 230,997.60

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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.