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Finding the Fourth Proportional to 586.84, 809.86 and 354.12

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Solution

The fourth proportional to 586.84, 809.86 and 354.12 is: 488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.84 : 809.86 = 354.12 : x
  2. Step 2: Convert to fraction form
    586.84/809.86 = 354.12/x
  3. Step 3: Cross multiply
    586.84x = 809.86 × 354.12
  4. Step 4: Simplify right side
    586.84x = 286,787.62
  5. Step 5: Solve for x
    x = 286,787.62/586.84
  6. Step 6: Final answer
    x = 488.70

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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.