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Finding the Fourth Proportional to 487,313.16, 672,119.82 and 419,443.80

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Solution

The fourth proportional to 487,313.16, 672,119.82 and 419,443.80 is: 578,511.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,313.16 : 672,119.82 = 419,443.80 : x
  2. Step 2: Convert to fraction form
    487,313.16/672,119.82 = 419,443.80/x
  3. Step 3: Cross multiply
    487,313.16x = 672,119.82 × 419,443.80
  4. Step 4: Simplify right side
    487,313.16x = 281,916,491,356.12
  5. Step 5: Solve for x
    x = 281,916,491,356.12/487,313.16
  6. Step 6: Final answer
    x = 578,511.96

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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.