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Finding the Fourth Proportional to 699,968.92, 965,948.70 and 398,162.20

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Solution

The fourth proportional to 699,968.92, 965,948.70 and 398,162.20 is: 549,459.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,968.92 : 965,948.70 = 398,162.20 : x
  2. Step 2: Convert to fraction form
    699,968.92/965,948.70 = 398,162.20/x
  3. Step 3: Cross multiply
    699,968.92x = 965,948.70 × 398,162.20
  4. Step 4: Simplify right side
    699,968.92x = 384,604,259,479.14
  5. Step 5: Solve for x
    x = 384,604,259,479.14/699,968.92
  6. Step 6: Final answer
    x = 549,459.05

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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.