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Finding the Fourth Proportional to 309,862.68, 426,813.84 and 219,062.40

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Solution

The fourth proportional to 309,862.68, 426,813.84 and 219,062.40 is: 301,742.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,862.68 : 426,813.84 = 219,062.40 : x
  2. Step 2: Convert to fraction form
    309,862.68/426,813.84 = 219,062.40/x
  3. Step 3: Cross multiply
    309,862.68x = 426,813.84 × 219,062.40
  4. Step 4: Simplify right side
    309,862.68x = 93,498,864,143.62
  5. Step 5: Solve for x
    x = 93,498,864,143.62/309,862.68
  6. Step 6: Final answer
    x = 301,742.90

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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.