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Finding the Fourth Proportional to 697.02, 961.50 and 621.24

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Solution

The fourth proportional to 697.02, 961.50 and 621.24 is: 856.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.02 : 961.50 = 621.24 : x
  2. Step 2: Convert to fraction form
    697.02/961.50 = 621.24/x
  3. Step 3: Cross multiply
    697.02x = 961.50 × 621.24
  4. Step 4: Simplify right side
    697.02x = 597,322.26
  5. Step 5: Solve for x
    x = 597,322.26/697.02
  6. Step 6: Final answer
    x = 856.97

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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.