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Finding the Fourth Proportional to 681,323.48, 940,247.71 and 390,988.16

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Solution

The fourth proportional to 681,323.48, 940,247.71 and 390,988.16 is: 539,575.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,323.48 : 940,247.71 = 390,988.16 : x
  2. Step 2: Convert to fraction form
    681,323.48/940,247.71 = 390,988.16/x
  3. Step 3: Cross multiply
    681,323.48x = 940,247.71 × 390,988.16
  4. Step 4: Simplify right side
    681,323.48x = 367,625,725,213.23
  5. Step 5: Solve for x
    x = 367,625,725,213.23/681,323.48
  6. Step 6: Final answer
    x = 539,575.89

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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.