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Finding the Fourth Proportional to 837.32, 1,155.56 and 557.08

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Solution

The fourth proportional to 837.32, 1,155.56 and 557.08 is: 768.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.32 : 1,155.56 = 557.08 : x
  2. Step 2: Convert to fraction form
    837.32/1,155.56 = 557.08/x
  3. Step 3: Cross multiply
    837.32x = 1,155.56 × 557.08
  4. Step 4: Simplify right side
    837.32x = 643,739.36
  5. Step 5: Solve for x
    x = 643,739.36/837.32
  6. Step 6: Final answer
    x = 768.81

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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.