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Finding the Fourth Proportional to 684,438.12, 944,530.88 and 378,498.69

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Solution

The fourth proportional to 684,438.12, 944,530.88 and 378,498.69 is: 522,331.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,438.12 : 944,530.88 = 378,498.69 : x
  2. Step 2: Convert to fraction form
    684,438.12/944,530.88 = 378,498.69/x
  3. Step 3: Cross multiply
    684,438.12x = 944,530.88 × 378,498.69
  4. Step 4: Simplify right side
    684,438.12x = 357,503,698,852.05
  5. Step 5: Solve for x
    x = 357,503,698,852.05/684,438.12
  6. Step 6: Final answer
    x = 522,331.66

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Double scale
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Similar ratio
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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.