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Finding the Fourth Proportional to 487,603.87, 731,142.82 and 221,219.04

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Solution

The fourth proportional to 487,603.87, 731,142.82 and 221,219.04 is: 331,709.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,603.87 : 731,142.82 = 221,219.04 : x
  2. Step 2: Convert to fraction form
    487,603.87/731,142.82 = 221,219.04/x
  3. Step 3: Cross multiply
    487,603.87x = 731,142.82 × 221,219.04
  4. Step 4: Simplify right side
    487,603.87x = 161,742,712,743.29
  5. Step 5: Solve for x
    x = 161,742,712,743.29/487,603.87
  6. Step 6: Final answer
    x = 331,709.25

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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.