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Finding the Fourth Proportional to 424,643.60, 636,965.40 and 171,923.60

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Solution

The fourth proportional to 424,643.60, 636,965.40 and 171,923.60 is: 257,885.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,643.60 : 636,965.40 = 171,923.60 : x
  2. Step 2: Convert to fraction form
    424,643.60/636,965.40 = 171,923.60/x
  3. Step 3: Cross multiply
    424,643.60x = 636,965.40 × 171,923.60
  4. Step 4: Simplify right side
    424,643.60x = 109,509,384,643.44
  5. Step 5: Solve for x
    x = 109,509,384,643.44/424,643.60
  6. Step 6: Final answer
    x = 257,885.40

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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.