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Finding the Fourth Proportional to 1,377.64, 1,902.90 and 1,157.32

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Solution

The fourth proportional to 1,377.64, 1,902.90 and 1,157.32 is: 1,598.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.64 : 1,902.90 = 1,157.32 : x
  2. Step 2: Convert to fraction form
    1,377.64/1,902.90 = 1,157.32/x
  3. Step 3: Cross multiply
    1,377.64x = 1,902.90 × 1,157.32
  4. Step 4: Simplify right side
    1,377.64x = 2,202,264.23
  5. Step 5: Solve for x
    x = 2,202,264.23/1,377.64
  6. Step 6: Final answer
    x = 1,598.58

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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.