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Finding the Fourth Proportional to 688.18, 949.71 and 373.46

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Solution

The fourth proportional to 688.18, 949.71 and 373.46 is: 515.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.18 : 949.71 = 373.46 : x
  2. Step 2: Convert to fraction form
    688.18/949.71 = 373.46/x
  3. Step 3: Cross multiply
    688.18x = 949.71 × 373.46
  4. Step 4: Simplify right side
    688.18x = 354,675.63
  5. Step 5: Solve for x
    x = 354,675.63/688.18
  6. Step 6: Final answer
    x = 515.38

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Double scale
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1.5x scale

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.