Home / 285,308.61-393,721.07-157,981.47

Finding the Fourth Proportional to 285,308.61, 393,721.07 and 157,981.47

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Solution

The fourth proportional to 285,308.61, 393,721.07 and 157,981.47 is: 218,011.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,308.61 : 393,721.07 = 157,981.47 : x
  2. Step 2: Convert to fraction form
    285,308.61/393,721.07 = 157,981.47/x
  3. Step 3: Cross multiply
    285,308.61x = 393,721.07 × 157,981.47
  4. Step 4: Simplify right side
    285,308.61x = 62,200,634,095.12
  5. Step 5: Solve for x
    x = 62,200,634,095.12/285,308.61
  6. Step 6: Final answer
    x = 218,011.76

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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.