Home / 715,118.32-986,868.84-392,831.92

Finding the Fourth Proportional to 715,118.32, 986,868.84 and 392,831.92

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Solution

The fourth proportional to 715,118.32, 986,868.84 and 392,831.92 is: 542,111.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,118.32 : 986,868.84 = 392,831.92 : x
  2. Step 2: Convert to fraction form
    715,118.32/986,868.84 = 392,831.92/x
  3. Step 3: Cross multiply
    715,118.32x = 986,868.84 × 392,831.92
  4. Step 4: Simplify right side
    715,118.32x = 387,673,581,205.37
  5. Step 5: Solve for x
    x = 387,673,581,205.37/715,118.32
  6. Step 6: Final answer
    x = 542,111.10

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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.