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Finding the Fourth Proportional to 492,494.05, 679,641.78 and 266,139.55

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Solution

The fourth proportional to 492,494.05, 679,641.78 and 266,139.55 is: 367,272.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,494.05 : 679,641.78 = 266,139.55 : x
  2. Step 2: Convert to fraction form
    492,494.05/679,641.78 = 266,139.55/x
  3. Step 3: Cross multiply
    492,494.05x = 679,641.78 × 266,139.55
  4. Step 4: Simplify right side
    492,494.05x = 180,879,557,490.40
  5. Step 5: Solve for x
    x = 180,879,557,490.40/492,494.05
  6. Step 6: Final answer
    x = 367,272.57

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1.5x scale

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.