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Finding the Fourth Proportional to 718,310, 1,077,470.40 and 318,843.38

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Solution

The fourth proportional to 718,310, 1,077,470.40 and 318,843.38 is: 478,267.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,310 : 1,077,470.40 = 318,843.38 : x
  2. Step 2: Convert to fraction form
    718,310/1,077,470.40 = 318,843.38/x
  3. Step 3: Cross multiply
    718,310x = 1,077,470.40 × 318,843.38
  4. Step 4: Simplify right side
    718,310x = 343,544,304,185.95
  5. Step 5: Solve for x
    x = 343,544,304,185.95/718,310
  6. Step 6: Final answer
    x = 478,267.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.