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Finding the Fourth Proportional to 1,374.08, 1,896.88 and 876.80

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Solution

The fourth proportional to 1,374.08, 1,896.88 and 876.80 is: 1,210.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.08 : 1,896.88 = 876.80 : x
  2. Step 2: Convert to fraction form
    1,374.08/1,896.88 = 876.80/x
  3. Step 3: Cross multiply
    1,374.08x = 1,896.88 × 876.80
  4. Step 4: Simplify right side
    1,374.08x = 1,663,184.38
  5. Step 5: Solve for x
    x = 1,663,184.38/1,374.08
  6. Step 6: Final answer
    x = 1,210.40

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1.5x scale

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.