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Finding the Fourth Proportional to 672.45, 943.35 and 672.45

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Solution

The fourth proportional to 672.45, 943.35 and 672.45 is: 943.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.45 : 943.35 = 672.45 : x
  2. Step 2: Convert to fraction form
    672.45/943.35 = 672.45/x
  3. Step 3: Cross multiply
    672.45x = 943.35 × 672.45
  4. Step 4: Simplify right side
    672.45x = 634,355.71
  5. Step 5: Solve for x
    x = 634,355.71/672.45
  6. Step 6: Final answer
    x = 943.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.