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Finding the Fourth Proportional to 321,985.91, 482,963.28 and 122,290.71

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Solution

The fourth proportional to 321,985.91, 482,963.28 and 122,290.71 is: 183,430.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,985.91 : 482,963.28 = 122,290.71 : x
  2. Step 2: Convert to fraction form
    321,985.91/482,963.28 = 122,290.71/x
  3. Step 3: Cross multiply
    321,985.91x = 482,963.28 × 122,290.71
  4. Step 4: Simplify right side
    321,985.91x = 59,061,922,415.13
  5. Step 5: Solve for x
    x = 59,061,922,415.13/321,985.91
  6. Step 6: Final answer
    x = 183,430.15

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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.