Home / 677,449.67-934,921.85-390,988.17

Finding the Fourth Proportional to 677,449.67, 934,921.85 and 390,988.17

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Solution

The fourth proportional to 677,449.67, 934,921.85 and 390,988.17 is: 539,587.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,449.67 : 934,921.85 = 390,988.17 : x
  2. Step 2: Convert to fraction form
    677,449.67/934,921.85 = 390,988.17/x
  3. Step 3: Cross multiply
    677,449.67x = 934,921.85 × 390,988.17
  4. Step 4: Simplify right side
    677,449.67x = 365,543,381,269.57
  5. Step 5: Solve for x
    x = 365,543,381,269.57/677,449.67
  6. Step 6: Final answer
    x = 539,587.51

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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.