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Finding the Fourth Proportional to 289,321.15, 400,024.73 and 253,407.88

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Solution

The fourth proportional to 289,321.15, 400,024.73 and 253,407.88 is: 350,369.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,321.15 : 400,024.73 = 253,407.88 : x
  2. Step 2: Convert to fraction form
    289,321.15/400,024.73 = 253,407.88/x
  3. Step 3: Cross multiply
    289,321.15x = 400,024.73 × 253,407.88
  4. Step 4: Simplify right side
    289,321.15x = 101,369,417,922.47
  5. Step 5: Solve for x
    x = 101,369,417,922.47/289,321.15
  6. Step 6: Final answer
    x = 350,369.88

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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.