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Finding the Fourth Proportional to 675.68, 930.84 and 556.88

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Solution

The fourth proportional to 675.68, 930.84 and 556.88 is: 767.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.68 : 930.84 = 556.88 : x
  2. Step 2: Convert to fraction form
    675.68/930.84 = 556.88/x
  3. Step 3: Cross multiply
    675.68x = 930.84 × 556.88
  4. Step 4: Simplify right side
    675.68x = 518,366.18
  5. Step 5: Solve for x
    x = 518,366.18/675.68
  6. Step 6: Final answer
    x = 767.18

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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.