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Finding the Fourth Proportional to 544,408.80, 815,738.40 and 402,691.20

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Solution

The fourth proportional to 544,408.80, 815,738.40 and 402,691.20 is: 603,389.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    544,408.80 : 815,738.40 = 402,691.20 : x
  2. Step 2: Convert to fraction form
    544,408.80/815,738.40 = 402,691.20/x
  3. Step 3: Cross multiply
    544,408.80x = 815,738.40 × 402,691.20
  4. Step 4: Simplify right side
    544,408.80x = 328,490,675,182.08
  5. Step 5: Solve for x
    x = 328,490,675,182.08/544,408.80
  6. Step 6: Final answer
    x = 603,389.72

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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.