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Finding the Fourth Proportional to 487,555.84, 731,425.26 and 221,335

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Solution

The fourth proportional to 487,555.84, 731,425.26 and 221,335 is: 332,044.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,555.84 : 731,425.26 = 221,335 : x
  2. Step 2: Convert to fraction form
    487,555.84/731,425.26 = 221,335/x
  3. Step 3: Cross multiply
    487,555.84x = 731,425.26 × 221,335
  4. Step 4: Simplify right side
    487,555.84x = 161,890,009,922.10
  5. Step 5: Solve for x
    x = 161,890,009,922.10/487,555.84
  6. Step 6: Final answer
    x = 332,044.04

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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.