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Finding the Fourth Proportional to 458,040.70, 686,866.65 and 221,455.90

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Solution

The fourth proportional to 458,040.70, 686,866.65 and 221,455.90 is: 332,089.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,040.70 : 686,866.65 = 221,455.90 : x
  2. Step 2: Convert to fraction form
    458,040.70/686,866.65 = 221,455.90/x
  3. Step 3: Cross multiply
    458,040.70x = 686,866.65 × 221,455.90
  4. Step 4: Simplify right side
    458,040.70x = 152,110,672,155.74
  5. Step 5: Solve for x
    x = 152,110,672,155.74/458,040.70
  6. Step 6: Final answer
    x = 332,089.86

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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.