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Finding the Fourth Proportional to 287,158.54, 396,263.26 and 158,071.88

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Solution

The fourth proportional to 287,158.54, 396,263.26 and 158,071.88 is: 218,130.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,158.54 : 396,263.26 = 158,071.88 : x
  2. Step 2: Convert to fraction form
    287,158.54/396,263.26 = 158,071.88/x
  3. Step 3: Cross multiply
    287,158.54x = 396,263.26 × 158,071.88
  4. Step 4: Simplify right side
    287,158.54x = 62,638,078,483.13
  5. Step 5: Solve for x
    x = 62,638,078,483.13/287,158.54
  6. Step 6: Final answer
    x = 218,130.65

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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.