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Finding the Fourth Proportional to 640,535.93, 960,903.53 and 213,939.71

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Solution

The fourth proportional to 640,535.93, 960,903.53 and 213,939.71 is: 320,942.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,535.93 : 960,903.53 = 213,939.71 : x
  2. Step 2: Convert to fraction form
    640,535.93/960,903.53 = 213,939.71/x
  3. Step 3: Cross multiply
    640,535.93x = 960,903.53 × 213,939.71
  4. Step 4: Simplify right side
    640,535.93x = 205,575,425,483.28
  5. Step 5: Solve for x
    x = 205,575,425,483.28/640,535.93
  6. Step 6: Final answer
    x = 320,942.85

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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.