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Finding the Fourth Proportional to 385,105.52, 531,445.74 and 215,340.14

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Solution

The fourth proportional to 385,105.52, 531,445.74 and 215,340.14 is: 297,169.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,105.52 : 531,445.74 = 215,340.14 : x
  2. Step 2: Convert to fraction form
    385,105.52/531,445.74 = 215,340.14/x
  3. Step 3: Cross multiply
    385,105.52x = 531,445.74 × 215,340.14
  4. Step 4: Simplify right side
    385,105.52x = 114,441,600,054.00
  5. Step 5: Solve for x
    x = 114,441,600,054.00/385,105.52
  6. Step 6: Final answer
    x = 297,169.46

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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.