Home / 662,723.64-914,515.05-390,778.38

Finding the Fourth Proportional to 662,723.64, 914,515.05 and 390,778.38

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Solution

The fourth proportional to 662,723.64, 914,515.05 and 390,778.38 is: 539,248.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,723.64 : 914,515.05 = 390,778.38 : x
  2. Step 2: Convert to fraction form
    662,723.64/914,515.05 = 390,778.38/x
  3. Step 3: Cross multiply
    662,723.64x = 914,515.05 × 390,778.38
  4. Step 4: Simplify right side
    662,723.64x = 357,372,709,724.62
  5. Step 5: Solve for x
    x = 357,372,709,724.62/662,723.64
  6. Step 6: Final answer
    x = 539,248.47

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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.