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Finding the Fourth Proportional to 761,320, 1,050,656.03 and 421,788.25

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Solution

The fourth proportional to 761,320, 1,050,656.03 and 421,788.25 is: 582,086.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,320 : 1,050,656.03 = 421,788.25 : x
  2. Step 2: Convert to fraction form
    761,320/1,050,656.03 = 421,788.25/x
  3. Step 3: Cross multiply
    761,320x = 1,050,656.03 × 421,788.25
  4. Step 4: Simplify right side
    761,320x = 443,154,368,245.65
  5. Step 5: Solve for x
    x = 443,154,368,245.65/761,320
  6. Step 6: Final answer
    x = 582,086.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.