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Finding the Fourth Proportional to 710.80, 979.76 and 535.84

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Solution

The fourth proportional to 710.80, 979.76 and 535.84 is: 738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.80 : 979.76 = 535.84 : x
  2. Step 2: Convert to fraction form
    710.80/979.76 = 535.84/x
  3. Step 3: Cross multiply
    710.80x = 979.76 × 535.84
  4. Step 4: Simplify right side
    710.80x = 524,994.60
  5. Step 5: Solve for x
    x = 524,994.60/710.80
  6. Step 6: Final answer
    x = 738.60

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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.