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Finding the Fourth Proportional to 371,387.18, 512,516.42 and 218,431.80

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Solution

The fourth proportional to 371,387.18, 512,516.42 and 218,431.80 is: 301,437.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,387.18 : 512,516.42 = 218,431.80 : x
  2. Step 2: Convert to fraction form
    371,387.18/512,516.42 = 218,431.80/x
  3. Step 3: Cross multiply
    371,387.18x = 512,516.42 × 218,431.80
  4. Step 4: Simplify right side
    371,387.18x = 111,949,883,058.00
  5. Step 5: Solve for x
    x = 111,949,883,058.00/371,387.18
  6. Step 6: Final answer
    x = 301,437.13

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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.