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Finding the Fourth Proportional to 681,341.81, 940,270.64 and 390,977.91

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Solution

The fourth proportional to 681,341.81, 940,270.64 and 390,977.91 is: 539,560.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,341.81 : 940,270.64 = 390,977.91 : x
  2. Step 2: Convert to fraction form
    681,341.81/940,270.64 = 390,977.91/x
  3. Step 3: Cross multiply
    681,341.81x = 940,270.64 × 390,977.91
  4. Step 4: Simplify right side
    681,341.81x = 367,625,047,706.67
  5. Step 5: Solve for x
    x = 367,625,047,706.67/681,341.81
  6. Step 6: Final answer
    x = 539,560.39

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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.