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Finding the Fourth Proportional to 675.79, 931.47 and 535.66

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Solution

The fourth proportional to 675.79, 931.47 and 535.66 is: 738.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.79 : 931.47 = 535.66 : x
  2. Step 2: Convert to fraction form
    675.79/931.47 = 535.66/x
  3. Step 3: Cross multiply
    675.79x = 931.47 × 535.66
  4. Step 4: Simplify right side
    675.79x = 498,951.22
  5. Step 5: Solve for x
    x = 498,951.22/675.79
  6. Step 6: Final answer
    x = 738.32

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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.