Home / 661,529.15-912,950.05-389,778.16

Finding the Fourth Proportional to 661,529.15, 912,950.05 and 389,778.16

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Solution

The fourth proportional to 661,529.15, 912,950.05 and 389,778.16 is: 537,917.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,529.15 : 912,950.05 = 389,778.16 : x
  2. Step 2: Convert to fraction form
    661,529.15/912,950.05 = 389,778.16/x
  3. Step 3: Cross multiply
    661,529.15x = 912,950.05 × 389,778.16
  4. Step 4: Simplify right side
    661,529.15x = 355,847,990,660.91
  5. Step 5: Solve for x
    x = 355,847,990,660.91/661,529.15
  6. Step 6: Final answer
    x = 537,917.32

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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.