Home / 215,815.40-323,723.10-208,557.80

Finding the Fourth Proportional to 215,815.40, 323,723.10 and 208,557.80

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Solution

The fourth proportional to 215,815.40, 323,723.10 and 208,557.80 is: 312,836.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,815.40 : 323,723.10 = 208,557.80 : x
  2. Step 2: Convert to fraction form
    215,815.40/323,723.10 = 208,557.80/x
  3. Step 3: Cross multiply
    215,815.40x = 323,723.10 × 208,557.80
  4. Step 4: Simplify right side
    215,815.40x = 67,514,977,545.18
  5. Step 5: Solve for x
    x = 67,514,977,545.18/215,815.40
  6. Step 6: Final answer
    x = 312,836.70

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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.