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Finding the Fourth Proportional to 381,042.72, 525,831.12 and 211,275.36

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Solution

The fourth proportional to 381,042.72, 525,831.12 and 211,275.36 is: 291,555.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,042.72 : 525,831.12 = 211,275.36 : x
  2. Step 2: Convert to fraction form
    381,042.72/525,831.12 = 211,275.36/x
  3. Step 3: Cross multiply
    381,042.72x = 525,831.12 × 211,275.36
  4. Step 4: Simplify right side
    381,042.72x = 111,095,159,177.20
  5. Step 5: Solve for x
    x = 111,095,159,177.20/381,042.72
  6. Step 6: Final answer
    x = 291,555.65

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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.