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Finding the Fourth Proportional to 307,347.45, 424,128.35 and 178,288.47

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Solution

The fourth proportional to 307,347.45, 424,128.35 and 178,288.47 is: 246,031.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,347.45 : 424,128.35 = 178,288.47 : x
  2. Step 2: Convert to fraction form
    307,347.45/424,128.35 = 178,288.47/x
  3. Step 3: Cross multiply
    307,347.45x = 424,128.35 × 178,288.47
  4. Step 4: Simplify right side
    307,347.45x = 75,617,193,713.68
  5. Step 5: Solve for x
    x = 75,617,193,713.68/307,347.45
  6. Step 6: Final answer
    x = 246,031.63

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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.