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Finding the Fourth Proportional to 698.76, 961.54 and 571.58

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Solution

The fourth proportional to 698.76, 961.54 and 571.58 is: 786.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.76 : 961.54 = 571.58 : x
  2. Step 2: Convert to fraction form
    698.76/961.54 = 571.58/x
  3. Step 3: Cross multiply
    698.76x = 961.54 × 571.58
  4. Step 4: Simplify right side
    698.76x = 549,597.03
  5. Step 5: Solve for x
    x = 549,597.03/698.76
  6. Step 6: Final answer
    x = 786.53

Related Problems

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Half scale
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Double scale
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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.