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Finding the Fourth Proportional to 317,998.32, 438,864.62 and 216,249.51

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Solution

The fourth proportional to 317,998.32, 438,864.62 and 216,249.51 is: 298,442.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,998.32 : 438,864.62 = 216,249.51 : x
  2. Step 2: Convert to fraction form
    317,998.32/438,864.62 = 216,249.51/x
  3. Step 3: Cross multiply
    317,998.32x = 438,864.62 × 216,249.51
  4. Step 4: Simplify right side
    317,998.32x = 94,904,259,031.34
  5. Step 5: Solve for x
    x = 94,904,259,031.34/317,998.32
  6. Step 6: Final answer
    x = 298,442.64

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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.