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Finding the Fourth Proportional to 991.11, 1,485.56 and 470.69

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Solution

The fourth proportional to 991.11, 1,485.56 and 470.69 is: 705.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.11 : 1,485.56 = 470.69 : x
  2. Step 2: Convert to fraction form
    991.11/1,485.56 = 470.69/x
  3. Step 3: Cross multiply
    991.11x = 1,485.56 × 470.69
  4. Step 4: Simplify right side
    991.11x = 699,234.91
  5. Step 5: Solve for x
    x = 699,234.91/991.11
  6. Step 6: Final answer
    x = 705.50

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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.