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Finding the Fourth Proportional to 487,803.70, 731,486.85 and 221,427.10

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Solution

The fourth proportional to 487,803.70, 731,486.85 and 221,427.10 is: 332,041.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,803.70 : 731,486.85 = 221,427.10 : x
  2. Step 2: Convert to fraction form
    487,803.70/731,486.85 = 221,427.10/x
  3. Step 3: Cross multiply
    487,803.70x = 731,486.85 × 221,427.10
  4. Step 4: Simplify right side
    487,803.70x = 161,971,011,883.64
  5. Step 5: Solve for x
    x = 161,971,011,883.64/487,803.70
  6. Step 6: Final answer
    x = 332,041.38

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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.