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Finding the Fourth Proportional to 761,495.60, 1,050,863.84 and 421,963.86

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Solution

The fourth proportional to 761,495.60, 1,050,863.84 and 421,963.86 is: 582,310.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,495.60 : 1,050,863.84 = 421,963.86 : x
  2. Step 2: Convert to fraction form
    761,495.60/1,050,863.84 = 421,963.86/x
  3. Step 3: Cross multiply
    761,495.60x = 1,050,863.84 × 421,963.86
  4. Step 4: Simplify right side
    761,495.60x = 443,426,562,260.82
  5. Step 5: Solve for x
    x = 443,426,562,260.82/761,495.60
  6. Step 6: Final answer
    x = 582,310.08

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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.