Home / 686,385.70-1,028,966.18-349,237.78

Finding the Fourth Proportional to 686,385.70, 1,028,966.18 and 349,237.78

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Solution

The fourth proportional to 686,385.70, 1,028,966.18 and 349,237.78 is: 523,545.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,385.70 : 1,028,966.18 = 349,237.78 : x
  2. Step 2: Convert to fraction form
    686,385.70/1,028,966.18 = 349,237.78/x
  3. Step 3: Cross multiply
    686,385.70x = 1,028,966.18 × 349,237.78
  4. Step 4: Simplify right side
    686,385.70x = 359,353,864,398.28
  5. Step 5: Solve for x
    x = 359,353,864,398.28/686,385.70
  6. Step 6: Final answer
    x = 523,545.09

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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.