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Finding the Fourth Proportional to 384,875.87, 531,119.53 and 215,125.79

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Solution

The fourth proportional to 384,875.87, 531,119.53 and 215,125.79 is: 296,868.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,875.87 : 531,119.53 = 215,125.79 : x
  2. Step 2: Convert to fraction form
    384,875.87/531,119.53 = 215,125.79/x
  3. Step 3: Cross multiply
    384,875.87x = 531,119.53 × 215,125.79
  4. Step 4: Simplify right side
    384,875.87x = 114,257,510,072.39
  5. Step 5: Solve for x
    x = 114,257,510,072.39/384,875.87
  6. Step 6: Final answer
    x = 296,868.47

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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.