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Finding the Fourth Proportional to 487,816.48, 672,739.50 and 418,882.54

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Solution

The fourth proportional to 487,816.48, 672,739.50 and 418,882.54 is: 577,673.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,816.48 : 672,739.50 = 418,882.54 : x
  2. Step 2: Convert to fraction form
    487,816.48/672,739.50 = 418,882.54/x
  3. Step 3: Cross multiply
    487,816.48x = 672,739.50 × 418,882.54
  4. Step 4: Simplify right side
    487,816.48x = 281,798,830,518.33
  5. Step 5: Solve for x
    x = 281,798,830,518.33/487,816.48
  6. Step 6: Final answer
    x = 577,673.86

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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.