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Finding the Fourth Proportional to 245,407.80, 368,111.70 and 217,414.20

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Solution

The fourth proportional to 245,407.80, 368,111.70 and 217,414.20 is: 326,121.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,407.80 : 368,111.70 = 217,414.20 : x
  2. Step 2: Convert to fraction form
    245,407.80/368,111.70 = 217,414.20/x
  3. Step 3: Cross multiply
    245,407.80x = 368,111.70 × 217,414.20
  4. Step 4: Simplify right side
    245,407.80x = 80,032,710,766.14
  5. Step 5: Solve for x
    x = 80,032,710,766.14/245,407.80
  6. Step 6: Final answer
    x = 326,121.30

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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.