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Finding the Fourth Proportional to 385,555.65, 532,066.73 and 215,789.77

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Solution

The fourth proportional to 385,555.65, 532,066.73 and 215,789.77 is: 297,789.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,555.65 : 532,066.73 = 215,789.77 : x
  2. Step 2: Convert to fraction form
    385,555.65/532,066.73 = 215,789.77/x
  3. Step 3: Cross multiply
    385,555.65x = 532,066.73 × 215,789.77
  4. Step 4: Simplify right side
    385,555.65x = 114,814,556,877.49
  5. Step 5: Solve for x
    x = 114,814,556,877.49/385,555.65
  6. Step 6: Final answer
    x = 297,789.85

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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.