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Finding the Fourth Proportional to 518,214.10, 715,118.61 and 317,010.10

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Solution

The fourth proportional to 518,214.10, 715,118.61 and 317,010.10 is: 437,463.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,214.10 : 715,118.61 = 317,010.10 : x
  2. Step 2: Convert to fraction form
    518,214.10/715,118.61 = 317,010.10/x
  3. Step 3: Cross multiply
    518,214.10x = 715,118.61 × 317,010.10
  4. Step 4: Simplify right side
    518,214.10x = 226,699,822,067.96
  5. Step 5: Solve for x
    x = 226,699,822,067.96/518,214.10
  6. Step 6: Final answer
    x = 437,463.63

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1.5x scale

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.