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Finding the Fourth Proportional to 265,574.28, 398,623.86 and 140,915.28

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Solution

The fourth proportional to 265,574.28, 398,623.86 and 140,915.28 is: 211,512.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,574.28 : 398,623.86 = 140,915.28 : x
  2. Step 2: Convert to fraction form
    265,574.28/398,623.86 = 140,915.28/x
  3. Step 3: Cross multiply
    265,574.28x = 398,623.86 × 140,915.28
  4. Step 4: Simplify right side
    265,574.28x = 56,172,192,846.58
  5. Step 5: Solve for x
    x = 56,172,192,846.58/265,574.28
  6. Step 6: Final answer
    x = 211,512.17

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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.