Home / 761,635.20-1,141,358.40-428,507.52

Finding the Fourth Proportional to 761,635.20, 1,141,358.40 and 428,507.52

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Solution

The fourth proportional to 761,635.20, 1,141,358.40 and 428,507.52 is: 642,145.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,635.20 : 1,141,358.40 = 428,507.52 : x
  2. Step 2: Convert to fraction form
    761,635.20/1,141,358.40 = 428,507.52/x
  3. Step 3: Cross multiply
    761,635.20x = 1,141,358.40 × 428,507.52
  4. Step 4: Simplify right side
    761,635.20x = 489,080,657,415.17
  5. Step 5: Solve for x
    x = 489,080,657,415.17/761,635.20
  6. Step 6: Final answer
    x = 642,145.55

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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.