Home / 285,308.79-393,721.32-157,981.65

Finding the Fourth Proportional to 285,308.79, 393,721.32 and 157,981.65

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Solution

The fourth proportional to 285,308.79, 393,721.32 and 157,981.65 is: 218,012.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,308.79 : 393,721.32 = 157,981.65 : x
  2. Step 2: Convert to fraction form
    285,308.79/393,721.32 = 157,981.65/x
  3. Step 3: Cross multiply
    285,308.79x = 393,721.32 × 157,981.65
  4. Step 4: Simplify right side
    285,308.79x = 62,200,743,773.78
  5. Step 5: Solve for x
    x = 62,200,743,773.78/285,308.79
  6. Step 6: Final answer
    x = 218,012.01

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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.