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Finding the Fourth Proportional to 487,820.39, 731,730.59 and 321,569.51

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Solution

The fourth proportional to 487,820.39, 731,730.59 and 321,569.51 is: 482,354.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,820.39 : 731,730.59 = 321,569.51 : x
  2. Step 2: Convert to fraction form
    487,820.39/731,730.59 = 321,569.51/x
  3. Step 3: Cross multiply
    487,820.39x = 731,730.59 × 321,569.51
  4. Step 4: Simplify right side
    487,820.39x = 235,302,245,670.46
  5. Step 5: Solve for x
    x = 235,302,245,670.46/487,820.39
  6. Step 6: Final answer
    x = 482,354.27

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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.