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Finding the Fourth Proportional to 470.61, 705.90 and 145.98

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Solution

The fourth proportional to 470.61, 705.90 and 145.98 is: 218.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.61 : 705.90 = 145.98 : x
  2. Step 2: Convert to fraction form
    470.61/705.90 = 145.98/x
  3. Step 3: Cross multiply
    470.61x = 705.90 × 145.98
  4. Step 4: Simplify right side
    470.61x = 103,047.28
  5. Step 5: Solve for x
    x = 103,047.28/470.61
  6. Step 6: Final answer
    x = 218.97

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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.