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Finding the Fourth Proportional to 618,008.60, 926,138.10 and 542,775.80

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Solution

The fourth proportional to 618,008.60, 926,138.10 and 542,775.80 is: 813,395.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,008.60 : 926,138.10 = 542,775.80 : x
  2. Step 2: Convert to fraction form
    618,008.60/926,138.10 = 542,775.80/x
  3. Step 3: Cross multiply
    618,008.60x = 926,138.10 × 542,775.80
  4. Step 4: Simplify right side
    618,008.60x = 502,685,348,137.98
  5. Step 5: Solve for x
    x = 502,685,348,137.98/618,008.60
  6. Step 6: Final answer
    x = 813,395.39

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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.