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Finding the Fourth Proportional to 1,230.11, 1,697.51 and 670.57

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Solution

The fourth proportional to 1,230.11, 1,697.51 and 670.57 is: 925.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.11 : 1,697.51 = 670.57 : x
  2. Step 2: Convert to fraction form
    1,230.11/1,697.51 = 670.57/x
  3. Step 3: Cross multiply
    1,230.11x = 1,697.51 × 670.57
  4. Step 4: Simplify right side
    1,230.11x = 1,138,303.08
  5. Step 5: Solve for x
    x = 1,138,303.08/1,230.11
  6. Step 6: Final answer
    x = 925.37

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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.