Home / 714,239.07-985,678.34-391,960.70

Finding the Fourth Proportional to 714,239.07, 985,678.34 and 391,960.70

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Solution

The fourth proportional to 714,239.07, 985,678.34 and 391,960.70 is: 540,921.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,239.07 : 985,678.34 = 391,960.70 : x
  2. Step 2: Convert to fraction form
    714,239.07/985,678.34 = 391,960.70/x
  3. Step 3: Cross multiply
    714,239.07x = 985,678.34 × 391,960.70
  4. Step 4: Simplify right side
    714,239.07x = 386,347,172,121.24
  5. Step 5: Solve for x
    x = 386,347,172,121.24/714,239.07
  6. Step 6: Final answer
    x = 540,921.36

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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.