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Finding the Fourth Proportional to 558.04, 836.70 and 477.40

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Solution

The fourth proportional to 558.04, 836.70 and 477.40 is: 715.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.04 : 836.70 = 477.40 : x
  2. Step 2: Convert to fraction form
    558.04/836.70 = 477.40/x
  3. Step 3: Cross multiply
    558.04x = 836.70 × 477.40
  4. Step 4: Simplify right side
    558.04x = 399,440.58
  5. Step 5: Solve for x
    x = 399,440.58/558.04
  6. Step 6: Final answer
    x = 715.79

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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.