Home / 715,669.97-987,611.27-393,373.17

Finding the Fourth Proportional to 715,669.97, 987,611.27 and 393,373.17

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Solution

The fourth proportional to 715,669.97, 987,611.27 and 393,373.17 is: 542,847.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,669.97 : 987,611.27 = 393,373.17 : x
  2. Step 2: Convert to fraction form
    715,669.97/987,611.27 = 393,373.17/x
  3. Step 3: Cross multiply
    715,669.97x = 987,611.27 × 393,373.17
  4. Step 4: Simplify right side
    715,669.97x = 388,499,774,040.76
  5. Step 5: Solve for x
    x = 388,499,774,040.76/715,669.97
  6. Step 6: Final answer
    x = 542,847.67

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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.