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Finding the Fourth Proportional to 711, 981.19 and 435

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Solution

The fourth proportional to 711, 981.19 and 435 is: 600.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    711 : 981.19 = 435 : x
  2. Step 2: Convert to fraction form
    711/981.19 = 435/x
  3. Step 3: Cross multiply
    711x = 981.19 × 435
  4. Step 4: Simplify right side
    711x = 426,817.65
  5. Step 5: Solve for x
    x = 426,817.65/711
  6. Step 6: Final answer
    x = 600.31

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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.