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Finding the Fourth Proportional to 342,128.78, 472,034.01 and 238,760.22

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Solution

The fourth proportional to 342,128.78, 472,034.01 and 238,760.22 is: 329,416.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,128.78 : 472,034.01 = 238,760.22 : x
  2. Step 2: Convert to fraction form
    342,128.78/472,034.01 = 238,760.22/x
  3. Step 3: Cross multiply
    342,128.78x = 472,034.01 × 238,760.22
  4. Step 4: Simplify right side
    342,128.78x = 112,702,944,075.08
  5. Step 5: Solve for x
    x = 112,702,944,075.08/342,128.78
  6. Step 6: Final answer
    x = 329,416.74

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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.