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Finding the Fourth Proportional to 618,013.97, 852,778.40 and 356,378.93

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Solution

The fourth proportional to 618,013.97, 852,778.40 and 356,378.93 is: 491,756.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,013.97 : 852,778.40 = 356,378.93 : x
  2. Step 2: Convert to fraction form
    618,013.97/852,778.40 = 356,378.93/x
  3. Step 3: Cross multiply
    618,013.97x = 852,778.40 × 356,378.93
  4. Step 4: Simplify right side
    618,013.97x = 303,912,254,069.16
  5. Step 5: Solve for x
    x = 303,912,254,069.16/618,013.97
  6. Step 6: Final answer
    x = 491,756.29

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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.