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Finding the Fourth Proportional to 287,579.61, 396,862.74 and 158,522.67

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Solution

The fourth proportional to 287,579.61, 396,862.74 and 158,522.67 is: 218,762.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,579.61 : 396,862.74 = 158,522.67 : x
  2. Step 2: Convert to fraction form
    287,579.61/396,862.74 = 158,522.67/x
  3. Step 3: Cross multiply
    287,579.61x = 396,862.74 × 158,522.67
  4. Step 4: Simplify right side
    287,579.61x = 62,911,741,168.32
  5. Step 5: Solve for x
    x = 62,911,741,168.32/287,579.61
  6. Step 6: Final answer
    x = 218,762.87

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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.