Home / 458,038.20-686,862.90-221,453.40

Finding the Fourth Proportional to 458,038.20, 686,862.90 and 221,453.40

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Solution

The fourth proportional to 458,038.20, 686,862.90 and 221,453.40 is: 332,086.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,038.20 : 686,862.90 = 221,453.40 : x
  2. Step 2: Convert to fraction form
    458,038.20/686,862.90 = 221,453.40/x
  3. Step 3: Cross multiply
    458,038.20x = 686,862.90 × 221,453.40
  4. Step 4: Simplify right side
    458,038.20x = 152,108,124,538.86
  5. Step 5: Solve for x
    x = 152,108,124,538.86/458,038.20
  6. Step 6: Final answer
    x = 332,086.11

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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.