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Finding the Fourth Proportional to 486,794.64, 672,424.88 and 391,660.14

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Solution

The fourth proportional to 486,794.64, 672,424.88 and 391,660.14 is: 541,012.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,794.64 : 672,424.88 = 391,660.14 : x
  2. Step 2: Convert to fraction form
    486,794.64/672,424.88 = 391,660.14/x
  3. Step 3: Cross multiply
    486,794.64x = 672,424.88 × 391,660.14
  4. Step 4: Simplify right side
    486,794.64x = 263,362,020,681.98
  5. Step 5: Solve for x
    x = 263,362,020,681.98/486,794.64
  6. Step 6: Final answer
    x = 541,012.57

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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.