Home / 677,456.06-934,622.65-390,920.78

Finding the Fourth Proportional to 677,456.06, 934,622.65 and 390,920.78

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Solution

The fourth proportional to 677,456.06, 934,622.65 and 390,920.78 is: 539,316.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,456.06 : 934,622.65 = 390,920.78 : x
  2. Step 2: Convert to fraction form
    677,456.06/934,622.65 = 390,920.78/x
  3. Step 3: Cross multiply
    677,456.06x = 934,622.65 × 390,920.78
  4. Step 4: Simplify right side
    677,456.06x = 365,363,418,168.88
  5. Step 5: Solve for x
    x = 365,363,418,168.88/677,456.06
  6. Step 6: Final answer
    x = 539,316.78

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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.