Home / 458,042.20-686,868.90-221,457.40

Finding the Fourth Proportional to 458,042.20, 686,868.90 and 221,457.40

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Solution

The fourth proportional to 458,042.20, 686,868.90 and 221,457.40 is: 332,092.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,042.20 : 686,868.90 = 221,457.40 : x
  2. Step 2: Convert to fraction form
    458,042.20/686,868.90 = 221,457.40/x
  3. Step 3: Cross multiply
    458,042.20x = 686,868.90 × 221,457.40
  4. Step 4: Simplify right side
    458,042.20x = 152,112,200,734.86
  5. Step 5: Solve for x
    x = 152,112,200,734.86/458,042.20
  6. Step 6: Final answer
    x = 332,092.11

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1.5x scale

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.