Home / 285,308.86-393,721.41-157,981.72

Finding the Fourth Proportional to 285,308.86, 393,721.41 and 157,981.72

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Solution

The fourth proportional to 285,308.86, 393,721.41 and 157,981.72 is: 218,012.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,308.86 : 393,721.41 = 157,981.72 : x
  2. Step 2: Convert to fraction form
    285,308.86/393,721.41 = 157,981.72/x
  3. Step 3: Cross multiply
    285,308.86x = 393,721.41 × 157,981.72
  4. Step 4: Simplify right side
    285,308.86x = 62,200,785,552.63
  5. Step 5: Solve for x
    x = 62,200,785,552.63/285,308.86
  6. Step 6: Final answer
    x = 218,012.11

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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.