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Finding the Fourth Proportional to 371,427.39, 511,422.11 and 290,084.22

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Solution

The fourth proportional to 371,427.39, 511,422.11 and 290,084.22 is: 399,419.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,427.39 : 511,422.11 = 290,084.22 : x
  2. Step 2: Convert to fraction form
    371,427.39/511,422.11 = 290,084.22/x
  3. Step 3: Cross multiply
    371,427.39x = 511,422.11 × 290,084.22
  4. Step 4: Simplify right side
    371,427.39x = 148,355,483,870.10
  5. Step 5: Solve for x
    x = 148,355,483,870.10/371,427.39
  6. Step 6: Final answer
    x = 399,419.88

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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.