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Finding the Fourth Proportional to 521,840.87, 720,579.29 and 392,555.25

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Solution

The fourth proportional to 521,840.87, 720,579.29 and 392,555.25 is: 542,056.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,840.87 : 720,579.29 = 392,555.25 : x
  2. Step 2: Convert to fraction form
    521,840.87/720,579.29 = 392,555.25/x
  3. Step 3: Cross multiply
    521,840.87x = 720,579.29 × 392,555.25
  4. Step 4: Simplify right side
    521,840.87x = 282,867,181,368.00
  5. Step 5: Solve for x
    x = 282,867,181,368.00/521,840.87
  6. Step 6: Final answer
    x = 542,056.40

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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.