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Finding the Fourth Proportional to 487,682.32, 672,629.52 and 419,810.80

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Solution

The fourth proportional to 487,682.32, 672,629.52 and 419,810.80 is: 579,018.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,682.32 : 672,629.52 = 419,810.80 : x
  2. Step 2: Convert to fraction form
    487,682.32/672,629.52 = 419,810.80/x
  3. Step 3: Cross multiply
    487,682.32x = 672,629.52 × 419,810.80
  4. Step 4: Simplify right side
    487,682.32x = 282,377,136,894.82
  5. Step 5: Solve for x
    x = 282,377,136,894.82/487,682.32
  6. Step 6: Final answer
    x = 579,018.61

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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.