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Finding the Fourth Proportional to 424,210.36, 636,776.61 and 171,664.72

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Solution

The fourth proportional to 424,210.36, 636,776.61 and 171,664.72 is: 257,683.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,210.36 : 636,776.61 = 171,664.72 : x
  2. Step 2: Convert to fraction form
    424,210.36/636,776.61 = 171,664.72/x
  3. Step 3: Cross multiply
    424,210.36x = 636,776.61 × 171,664.72
  4. Step 4: Simplify right side
    424,210.36x = 109,312,078,458.20
  5. Step 5: Solve for x
    x = 109,312,078,458.20/424,210.36
  6. Step 6: Final answer
    x = 257,683.66

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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.