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Finding the Fourth Proportional to 295,618.40, 443,493.20 and 85,240

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Solution

The fourth proportional to 295,618.40, 443,493.20 and 85,240 is: 127,878.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,618.40 : 443,493.20 = 85,240 : x
  2. Step 2: Convert to fraction form
    295,618.40/443,493.20 = 85,240/x
  3. Step 3: Cross multiply
    295,618.40x = 443,493.20 × 85,240
  4. Step 4: Simplify right side
    295,618.40x = 37,803,360,368
  5. Step 5: Solve for x
    x = 37,803,360,368/295,618.40
  6. Step 6: Final answer
    x = 127,878.92

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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.