Home / 714,239.21-985,678.53-391,960.84

Finding the Fourth Proportional to 714,239.21, 985,678.53 and 391,960.84

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Solution

The fourth proportional to 714,239.21, 985,678.53 and 391,960.84 is: 540,921.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,239.21 : 985,678.53 = 391,960.84 : x
  2. Step 2: Convert to fraction form
    714,239.21/985,678.53 = 391,960.84/x
  3. Step 3: Cross multiply
    714,239.21x = 985,678.53 × 391,960.84
  4. Step 4: Simplify right side
    714,239.21x = 386,347,384,588.77
  5. Step 5: Solve for x
    x = 386,347,384,588.77/714,239.21
  6. Step 6: Final answer
    x = 540,921.56

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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.