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Finding the Fourth Proportional to 519,908.70, 717,089.85 and 328,737.90

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Solution

The fourth proportional to 519,908.70, 717,089.85 and 328,737.90 is: 453,415.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,908.70 : 717,089.85 = 328,737.90 : x
  2. Step 2: Convert to fraction form
    519,908.70/717,089.85 = 328,737.90/x
  3. Step 3: Cross multiply
    519,908.70x = 717,089.85 × 328,737.90
  4. Step 4: Simplify right side
    519,908.70x = 235,734,611,400.32
  5. Step 5: Solve for x
    x = 235,734,611,400.32/519,908.70
  6. Step 6: Final answer
    x = 453,415.40

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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.