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Finding the Fourth Proportional to 371,646.79, 512,784.34 and 218,691.65

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Solution

The fourth proportional to 371,646.79, 512,784.34 and 218,691.65 is: 301,742.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,646.79 : 512,784.34 = 218,691.65 : x
  2. Step 2: Convert to fraction form
    371,646.79/512,784.34 = 218,691.65/x
  3. Step 3: Cross multiply
    371,646.79x = 512,784.34 × 218,691.65
  4. Step 4: Simplify right side
    371,646.79x = 112,141,653,408.76
  5. Step 5: Solve for x
    x = 112,141,653,408.76/371,646.79
  6. Step 6: Final answer
    x = 301,742.56

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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.