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Finding the Fourth Proportional to 253,945, 350,444.10 and 140,785

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Solution

The fourth proportional to 253,945, 350,444.10 and 140,785 is: 194,283.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,945 : 350,444.10 = 140,785 : x
  2. Step 2: Convert to fraction form
    253,945/350,444.10 = 140,785/x
  3. Step 3: Cross multiply
    253,945x = 350,444.10 × 140,785
  4. Step 4: Simplify right side
    253,945x = 49,337,272,618.50
  5. Step 5: Solve for x
    x = 49,337,272,618.50/253,945
  6. Step 6: Final answer
    x = 194,283.30

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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.