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Finding the Fourth Proportional to 287,519.69, 396,779.86 and 158,462.77

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Solution

The fourth proportional to 287,519.69, 396,779.86 and 158,462.77 is: 218,680.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,519.69 : 396,779.86 = 158,462.77 : x
  2. Step 2: Convert to fraction form
    287,519.69/396,779.86 = 158,462.77/x
  3. Step 3: Cross multiply
    287,519.69x = 396,779.86 × 158,462.77
  4. Step 4: Simplify right side
    287,519.69x = 62,874,835,695.81
  5. Step 5: Solve for x
    x = 62,874,835,695.81/287,519.69
  6. Step 6: Final answer
    x = 218,680.10

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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.