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Finding the Fourth Proportional to 250,420.80, 345,578.72 and 137,243.28

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Solution

The fourth proportional to 250,420.80, 345,578.72 and 137,243.28 is: 189,394.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,420.80 : 345,578.72 = 137,243.28 : x
  2. Step 2: Convert to fraction form
    250,420.80/345,578.72 = 137,243.28/x
  3. Step 3: Cross multiply
    250,420.80x = 345,578.72 × 137,243.28
  4. Step 4: Simplify right side
    250,420.80x = 47,428,357,031.00
  5. Step 5: Solve for x
    x = 47,428,357,031.00/250,420.80
  6. Step 6: Final answer
    x = 189,394.64

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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.