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Finding the Fourth Proportional to 720,745.86, 993,401.11 and 659,659.98

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Solution

The fourth proportional to 720,745.86, 993,401.11 and 659,659.98 is: 909,206.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,745.86 : 993,401.11 = 659,659.98 : x
  2. Step 2: Convert to fraction form
    720,745.86/993,401.11 = 659,659.98/x
  3. Step 3: Cross multiply
    720,745.86x = 993,401.11 × 659,659.98
  4. Step 4: Simplify right side
    720,745.86x = 655,306,960,904.41
  5. Step 5: Solve for x
    x = 655,306,960,904.41/720,745.86
  6. Step 6: Final answer
    x = 909,206.69

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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.