Home / 681,412.32-940,310.16-390,962.32

Finding the Fourth Proportional to 681,412.32, 940,310.16 and 390,962.32

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Solution

The fourth proportional to 681,412.32, 940,310.16 and 390,962.32 is: 539,505.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,412.32 : 940,310.16 = 390,962.32 : x
  2. Step 2: Convert to fraction form
    681,412.32/940,310.16 = 390,962.32/x
  3. Step 3: Cross multiply
    681,412.32x = 940,310.16 × 390,962.32
  4. Step 4: Simplify right side
    681,412.32x = 367,625,841,673.17
  5. Step 5: Solve for x
    x = 367,625,841,673.17/681,412.32
  6. Step 6: Final answer
    x = 539,505.72

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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.