Home / 689,616.50-951,655.85-399,240.38

Finding the Fourth Proportional to 689,616.50, 951,655.85 and 399,240.38

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Solution

The fourth proportional to 689,616.50, 951,655.85 and 399,240.38 is: 550,943.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,616.50 : 951,655.85 = 399,240.38 : x
  2. Step 2: Convert to fraction form
    689,616.50/951,655.85 = 399,240.38/x
  3. Step 3: Cross multiply
    689,616.50x = 951,655.85 × 399,240.38
  4. Step 4: Simplify right side
    689,616.50x = 379,939,441,955.98
  5. Step 5: Solve for x
    x = 379,939,441,955.98/689,616.50
  6. Step 6: Final answer
    x = 550,943.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.