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Finding the Fourth Proportional to 287,492.77, 396,742.62 and 158,435.88

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Solution

The fourth proportional to 287,492.77, 396,742.62 and 158,435.88 is: 218,642.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,492.77 : 396,742.62 = 158,435.88 : x
  2. Step 2: Convert to fraction form
    287,492.77/396,742.62 = 158,435.88/x
  3. Step 3: Cross multiply
    287,492.77x = 396,742.62 × 158,435.88
  4. Step 4: Simplify right side
    287,492.77x = 62,858,266,133.21
  5. Step 5: Solve for x
    x = 62,858,266,133.21/287,492.77
  6. Step 6: Final answer
    x = 218,642.95

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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.