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Finding the Fourth Proportional to 487,806.70, 731,491.35 and 221,430.10

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Solution

The fourth proportional to 487,806.70, 731,491.35 and 221,430.10 is: 332,045.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,806.70 : 731,491.35 = 221,430.10 : x
  2. Step 2: Convert to fraction form
    487,806.70/731,491.35 = 221,430.10/x
  3. Step 3: Cross multiply
    487,806.70x = 731,491.35 × 221,430.10
  4. Step 4: Simplify right side
    487,806.70x = 161,974,202,779.64
  5. Step 5: Solve for x
    x = 161,974,202,779.64/487,806.70
  6. Step 6: Final answer
    x = 332,045.88

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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.