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Finding the Fourth Proportional to 219,332.40, 328,998.60 and 215,833.20

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Solution

The fourth proportional to 219,332.40, 328,998.60 and 215,833.20 is: 323,749.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,332.40 : 328,998.60 = 215,833.20 : x
  2. Step 2: Convert to fraction form
    219,332.40/328,998.60 = 215,833.20/x
  3. Step 3: Cross multiply
    219,332.40x = 328,998.60 × 215,833.20
  4. Step 4: Simplify right side
    219,332.40x = 71,008,820,633.52
  5. Step 5: Solve for x
    x = 71,008,820,633.52/219,332.40
  6. Step 6: Final answer
    x = 323,749.80

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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.