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Finding the Fourth Proportional to 2,088.76, 2,880.30 and 1,388.92

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Solution

The fourth proportional to 2,088.76, 2,880.30 and 1,388.92 is: 1,915.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,088.76 : 2,880.30 = 1,388.92 : x
  2. Step 2: Convert to fraction form
    2,088.76/2,880.30 = 1,388.92/x
  3. Step 3: Cross multiply
    2,088.76x = 2,880.30 × 1,388.92
  4. Step 4: Simplify right side
    2,088.76x = 4,000,506.28
  5. Step 5: Solve for x
    x = 4,000,506.28/2,088.76
  6. Step 6: Final answer
    x = 1,915.25

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Half scale
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Double scale
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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.