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Finding the Fourth Proportional to 607,638.42, 911,246.43 and 338,177.70

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Solution

The fourth proportional to 607,638.42, 911,246.43 and 338,177.70 is: 507,149.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,638.42 : 911,246.43 = 338,177.70 : x
  2. Step 2: Convert to fraction form
    607,638.42/911,246.43 = 338,177.70/x
  3. Step 3: Cross multiply
    607,638.42x = 911,246.43 × 338,177.70
  4. Step 4: Simplify right side
    607,638.42x = 308,163,221,830.61
  5. Step 5: Solve for x
    x = 308,163,221,830.61/607,638.42
  6. Step 6: Final answer
    x = 507,149.01

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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.