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Finding the Fourth Proportional to 624,128.63, 861,328.49 and 382,424.63

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Solution

The fourth proportional to 624,128.63, 861,328.49 and 382,424.63 is: 527,764.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,128.63 : 861,328.49 = 382,424.63 : x
  2. Step 2: Convert to fraction form
    624,128.63/861,328.49 = 382,424.63/x
  3. Step 3: Cross multiply
    624,128.63x = 861,328.49 × 382,424.63
  4. Step 4: Simplify right side
    624,128.63x = 329,393,222,877.94
  5. Step 5: Solve for x
    x = 329,393,222,877.94/624,128.63
  6. Step 6: Final answer
    x = 527,764.97

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Double scale
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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.