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Finding the Fourth Proportional to 287,181.84, 396,319.74 and 156,368.16

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Solution

The fourth proportional to 287,181.84, 396,319.74 and 156,368.16 is: 215,792.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,181.84 : 396,319.74 = 156,368.16 : x
  2. Step 2: Convert to fraction form
    287,181.84/396,319.74 = 156,368.16/x
  3. Step 3: Cross multiply
    287,181.84x = 396,319.74 × 156,368.16
  4. Step 4: Simplify right side
    287,181.84x = 61,971,788,515.48
  5. Step 5: Solve for x
    x = 61,971,788,515.48/287,181.84
  6. Step 6: Final answer
    x = 215,792.85

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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.