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Finding the Fourth Proportional to 1,230.55, 1,698.33 and 706.57

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Solution

The fourth proportional to 1,230.55, 1,698.33 and 706.57 is: 975.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.55 : 1,698.33 = 706.57 : x
  2. Step 2: Convert to fraction form
    1,230.55/1,698.33 = 706.57/x
  3. Step 3: Cross multiply
    1,230.55x = 1,698.33 × 706.57
  4. Step 4: Simplify right side
    1,230.55x = 1,199,989.03
  5. Step 5: Solve for x
    x = 1,199,989.03/1,230.55
  6. Step 6: Final answer
    x = 975.16

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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.