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Finding the Fourth Proportional to 670.40, 926.24 and 618.56

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Solution

The fourth proportional to 670.40, 926.24 and 618.56 is: 854.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.40 : 926.24 = 618.56 : x
  2. Step 2: Convert to fraction form
    670.40/926.24 = 618.56/x
  3. Step 3: Cross multiply
    670.40x = 926.24 × 618.56
  4. Step 4: Simplify right side
    670.40x = 572,935.01
  5. Step 5: Solve for x
    x = 572,935.01/670.40
  6. Step 6: Final answer
    x = 854.62

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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.