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Finding the Fourth Proportional to 670.44, 926.40 and 558.24

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Solution

The fourth proportional to 670.44, 926.40 and 558.24 is: 771.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.44 : 926.40 = 558.24 : x
  2. Step 2: Convert to fraction form
    670.44/926.40 = 558.24/x
  3. Step 3: Cross multiply
    670.44x = 926.40 × 558.24
  4. Step 4: Simplify right side
    670.44x = 517,153.54
  5. Step 5: Solve for x
    x = 517,153.54/670.44
  6. Step 6: Final answer
    x = 771.36

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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.