Home / 287,278.75-430,901.91-127,308.61

Finding the Fourth Proportional to 287,278.75, 430,901.91 and 127,308.61

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Solution

The fourth proportional to 287,278.75, 430,901.91 and 127,308.61 is: 190,955.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,278.75 : 430,901.91 = 127,308.61 : x
  2. Step 2: Convert to fraction form
    287,278.75/430,901.91 = 127,308.61/x
  3. Step 3: Cross multiply
    287,278.75x = 430,901.91 × 127,308.61
  4. Step 4: Simplify right side
    287,278.75x = 54,857,521,053.94
  5. Step 5: Solve for x
    x = 54,857,521,053.94/287,278.75
  6. Step 6: Final answer
    x = 190,955.73

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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.