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Finding the Fourth Proportional to 700.40, 966.56 and 385.70

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Solution

The fourth proportional to 700.40, 966.56 and 385.70 is: 532.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.40 : 966.56 = 385.70 : x
  2. Step 2: Convert to fraction form
    700.40/966.56 = 385.70/x
  3. Step 3: Cross multiply
    700.40x = 966.56 × 385.70
  4. Step 4: Simplify right side
    700.40x = 372,802.19
  5. Step 5: Solve for x
    x = 372,802.19/700.40
  6. Step 6: Final answer
    x = 532.27

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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.