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Finding the Fourth Proportional to 519,642.63, 717,071.06 and 287,059.28

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Solution

The fourth proportional to 519,642.63, 717,071.06 and 287,059.28 is: 396,122.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,642.63 : 717,071.06 = 287,059.28 : x
  2. Step 2: Convert to fraction form
    519,642.63/717,071.06 = 287,059.28/x
  3. Step 3: Cross multiply
    519,642.63x = 717,071.06 × 287,059.28
  4. Step 4: Simplify right side
    519,642.63x = 205,841,898,607.08
  5. Step 5: Solve for x
    x = 205,841,898,607.08/519,642.63
  6. Step 6: Final answer
    x = 396,122.04

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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.