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Finding the Fourth Proportional to 518,368.68, 715,076.10 and 356,943.78

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Solution

The fourth proportional to 518,368.68, 715,076.10 and 356,943.78 is: 492,394.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,368.68 : 715,076.10 = 356,943.78 : x
  2. Step 2: Convert to fraction form
    518,368.68/715,076.10 = 356,943.78/x
  3. Step 3: Cross multiply
    518,368.68x = 715,076.10 × 356,943.78
  4. Step 4: Simplify right side
    518,368.68x = 255,241,966,121.66
  5. Step 5: Solve for x
    x = 255,241,966,121.66/518,368.68
  6. Step 6: Final answer
    x = 492,394.65

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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.