Home / 781,807.78-1,078,896.82-424,111.78

Finding the Fourth Proportional to 781,807.78, 1,078,896.82 and 424,111.78

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Solution

The fourth proportional to 781,807.78, 1,078,896.82 and 424,111.78 is: 585,275.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,807.78 : 1,078,896.82 = 424,111.78 : x
  2. Step 2: Convert to fraction form
    781,807.78/1,078,896.82 = 424,111.78/x
  3. Step 3: Cross multiply
    781,807.78x = 1,078,896.82 × 424,111.78
  4. Step 4: Simplify right side
    781,807.78x = 457,572,850,766.54
  5. Step 5: Solve for x
    x = 457,572,850,766.54/781,807.78
  6. Step 6: Final answer
    x = 585,275.39

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Half scale
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Double scale
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Similar ratio
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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.