Home / 715,108.32-986,855.04-392,821.92

Finding the Fourth Proportional to 715,108.32, 986,855.04 and 392,821.92

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Solution

The fourth proportional to 715,108.32, 986,855.04 and 392,821.92 is: 542,097.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,108.32 : 986,855.04 = 392,821.92 : x
  2. Step 2: Convert to fraction form
    715,108.32/986,855.04 = 392,821.92/x
  3. Step 3: Cross multiply
    715,108.32x = 986,855.04 × 392,821.92
  4. Step 4: Simplify right side
    715,108.32x = 387,658,291,574.48
  5. Step 5: Solve for x
    x = 387,658,291,574.48/715,108.32
  6. Step 6: Final answer
    x = 542,097.30

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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.