Home / 677,418.36-934,836.24-390,938.40

Finding the Fourth Proportional to 677,418.36, 934,836.24 and 390,938.40

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Solution

The fourth proportional to 677,418.36, 934,836.24 and 390,938.40 is: 539,494.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,418.36 : 934,836.24 = 390,938.40 : x
  2. Step 2: Convert to fraction form
    677,418.36/934,836.24 = 390,938.40/x
  3. Step 3: Cross multiply
    677,418.36x = 934,836.24 × 390,938.40
  4. Step 4: Simplify right side
    677,418.36x = 365,463,383,927.62
  5. Step 5: Solve for x
    x = 365,463,383,927.62/677,418.36
  6. Step 6: Final answer
    x = 539,494.36

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Double scale
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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.