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Finding the Fourth Proportional to 487,593.66, 672,879.24 and 317,827.79

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Solution

The fourth proportional to 487,593.66, 672,879.24 and 317,827.79 is: 438,602.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,593.66 : 672,879.24 = 317,827.79 : x
  2. Step 2: Convert to fraction form
    487,593.66/672,879.24 = 317,827.79/x
  3. Step 3: Cross multiply
    487,593.66x = 672,879.24 × 317,827.79
  4. Step 4: Simplify right side
    487,593.66x = 213,859,718,421.68
  5. Step 5: Solve for x
    x = 213,859,718,421.68/487,593.66
  6. Step 6: Final answer
    x = 438,602.34

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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.