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Finding the Fourth Proportional to 487,502.72, 731,164.44 and 221,199.20

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Solution

The fourth proportional to 487,502.72, 731,164.44 and 221,199.20 is: 331,758.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,502.72 : 731,164.44 = 221,199.20 : x
  2. Step 2: Convert to fraction form
    487,502.72/731,164.44 = 221,199.20/x
  3. Step 3: Cross multiply
    487,502.72x = 731,164.44 × 221,199.20
  4. Step 4: Simplify right side
    487,502.72x = 161,732,989,196.45
  5. Step 5: Solve for x
    x = 161,732,989,196.45/487,502.72
  6. Step 6: Final answer
    x = 331,758.13

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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.