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Finding the Fourth Proportional to 486,521.80, 729,782.70 and 399,041.80

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Solution

The fourth proportional to 486,521.80, 729,782.70 and 399,041.80 is: 598,562.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,521.80 : 729,782.70 = 399,041.80 : x
  2. Step 2: Convert to fraction form
    486,521.80/729,782.70 = 399,041.80/x
  3. Step 3: Cross multiply
    486,521.80x = 729,782.70 × 399,041.80
  4. Step 4: Simplify right side
    486,521.80x = 291,213,802,216.86
  5. Step 5: Solve for x
    x = 291,213,802,216.86/486,521.80
  6. Step 6: Final answer
    x = 598,562.70

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.