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Finding the Fourth Proportional to 562,713.72, 776,618.82 and 320,940.90

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Solution

The fourth proportional to 562,713.72, 776,618.82 and 320,940.90 is: 442,940.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    562,713.72 : 776,618.82 = 320,940.90 : x
  2. Step 2: Convert to fraction form
    562,713.72/776,618.82 = 320,940.90/x
  3. Step 3: Cross multiply
    562,713.72x = 776,618.82 × 320,940.90
  4. Step 4: Simplify right side
    562,713.72x = 249,248,743,047.74
  5. Step 5: Solve for x
    x = 249,248,743,047.74/562,713.72
  6. Step 6: Final answer
    x = 442,940.58

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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.