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Finding the Fourth Proportional to 490.84, 740.65 and 470.86

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Solution

The fourth proportional to 490.84, 740.65 and 470.86 is: 710.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.84 : 740.65 = 470.86 : x
  2. Step 2: Convert to fraction form
    490.84/740.65 = 470.86/x
  3. Step 3: Cross multiply
    490.84x = 740.65 × 470.86
  4. Step 4: Simplify right side
    490.84x = 348,742.46
  5. Step 5: Solve for x
    x = 348,742.46/490.84
  6. Step 6: Final answer
    x = 710.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.