Home / 487,815.48-672,738.13-418,881.54

Finding the Fourth Proportional to 487,815.48, 672,738.13 and 418,881.54

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Solution

The fourth proportional to 487,815.48, 672,738.13 and 418,881.54 is: 577,672.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,815.48 : 672,738.13 = 418,881.54 : x
  2. Step 2: Convert to fraction form
    487,815.48/672,738.13 = 418,881.54/x
  3. Step 3: Cross multiply
    487,815.48x = 672,738.13 × 418,881.54
  4. Step 4: Simplify right side
    487,815.48x = 281,797,581,816.71
  5. Step 5: Solve for x
    x = 281,797,581,816.71/487,815.48
  6. Step 6: Final answer
    x = 577,672.49

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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.