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Finding the Fourth Proportional to 636,906.18, 879,323.22 and 438,337.50

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Solution

The fourth proportional to 636,906.18, 879,323.22 and 438,337.50 is: 605,176.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,906.18 : 879,323.22 = 438,337.50 : x
  2. Step 2: Convert to fraction form
    636,906.18/879,323.22 = 438,337.50/x
  3. Step 3: Cross multiply
    636,906.18x = 879,323.22 × 438,337.50
  4. Step 4: Simplify right side
    636,906.18x = 385,440,341,946.75
  5. Step 5: Solve for x
    x = 385,440,341,946.75/636,906.18
  6. Step 6: Final answer
    x = 605,176.01

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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.