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Finding the Fourth Proportional to 371,805.80, 557,708.70 and 231,643.40

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Solution

The fourth proportional to 371,805.80, 557,708.70 and 231,643.40 is: 347,465.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,805.80 : 557,708.70 = 231,643.40 : x
  2. Step 2: Convert to fraction form
    371,805.80/557,708.70 = 231,643.40/x
  3. Step 3: Cross multiply
    371,805.80x = 557,708.70 × 231,643.40
  4. Step 4: Simplify right side
    371,805.80x = 129,189,539,477.58
  5. Step 5: Solve for x
    x = 129,189,539,477.58/371,805.80
  6. Step 6: Final answer
    x = 347,465.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.