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Finding the Fourth Proportional to 424,003.90, 636,005.85 and 256,042.30

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Solution

The fourth proportional to 424,003.90, 636,005.85 and 256,042.30 is: 384,063.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,003.90 : 636,005.85 = 256,042.30 : x
  2. Step 2: Convert to fraction form
    424,003.90/636,005.85 = 256,042.30/x
  3. Step 3: Cross multiply
    424,003.90x = 636,005.85 × 256,042.30
  4. Step 4: Simplify right side
    424,003.90x = 162,844,400,647.46
  5. Step 5: Solve for x
    x = 162,844,400,647.46/424,003.90
  6. Step 6: Final answer
    x = 384,063.45

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1.5x scale

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.