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Finding the Fourth Proportional to 714.14, 981.80 and 709.70

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Solution

The fourth proportional to 714.14, 981.80 and 709.70 is: 975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.14 : 981.80 = 709.70 : x
  2. Step 2: Convert to fraction form
    714.14/981.80 = 709.70/x
  3. Step 3: Cross multiply
    714.14x = 981.80 × 709.70
  4. Step 4: Simplify right side
    714.14x = 696,783.46
  5. Step 5: Solve for x
    x = 696,783.46/714.14
  6. Step 6: Final answer
    x = 975.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.