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Finding the Fourth Proportional to 2,155.92, 2,973.60 and 1,492.80

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Solution

The fourth proportional to 2,155.92, 2,973.60 and 1,492.80 is: 2,058.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.92 : 2,973.60 = 1,492.80 : x
  2. Step 2: Convert to fraction form
    2,155.92/2,973.60 = 1,492.80/x
  3. Step 3: Cross multiply
    2,155.92x = 2,973.60 × 1,492.80
  4. Step 4: Simplify right side
    2,155.92x = 4,438,990.08
  5. Step 5: Solve for x
    x = 4,438,990.08/2,155.92
  6. Step 6: Final answer
    x = 2,058.98

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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.