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Finding the Fourth Proportional to 691.85, 954.83 and 670.32

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Solution

The fourth proportional to 691.85, 954.83 and 670.32 is: 925.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.85 : 954.83 = 670.32 : x
  2. Step 2: Convert to fraction form
    691.85/954.83 = 670.32/x
  3. Step 3: Cross multiply
    691.85x = 954.83 × 670.32
  4. Step 4: Simplify right side
    691.85x = 640,041.65
  5. Step 5: Solve for x
    x = 640,041.65/691.85
  6. Step 6: Final answer
    x = 925.12

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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.