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Finding the Fourth Proportional to 478,364.70, 717,547.05 and 278,910.30

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Solution

The fourth proportional to 478,364.70, 717,547.05 and 278,910.30 is: 418,365.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,364.70 : 717,547.05 = 278,910.30 : x
  2. Step 2: Convert to fraction form
    478,364.70/717,547.05 = 278,910.30/x
  3. Step 3: Cross multiply
    478,364.70x = 717,547.05 × 278,910.30
  4. Step 4: Simplify right side
    478,364.70x = 200,131,262,979.62
  5. Step 5: Solve for x
    x = 200,131,262,979.62/478,364.70
  6. Step 6: Final answer
    x = 418,365.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.