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Finding the Fourth Proportional to 664,389.40, 993,959.70 and 576,617.80

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Solution

The fourth proportional to 664,389.40, 993,959.70 and 576,617.80 is: 862,649.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,389.40 : 993,959.70 = 576,617.80 : x
  2. Step 2: Convert to fraction form
    664,389.40/993,959.70 = 576,617.80/x
  3. Step 3: Cross multiply
    664,389.40x = 993,959.70 × 576,617.80
  4. Step 4: Simplify right side
    664,389.40x = 573,134,855,502.66
  5. Step 5: Solve for x
    x = 573,134,855,502.66/664,389.40
  6. Step 6: Final answer
    x = 862,649.01

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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.