Home / 860.03-1,186.85-487.02

Finding the Fourth Proportional to 860.03, 1,186.85 and 487.02

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Solution

The fourth proportional to 860.03, 1,186.85 and 487.02 is: 672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.03 : 1,186.85 = 487.02 : x
  2. Step 2: Convert to fraction form
    860.03/1,186.85 = 487.02/x
  3. Step 3: Cross multiply
    860.03x = 1,186.85 × 487.02
  4. Step 4: Simplify right side
    860.03x = 578,022.02
  5. Step 5: Solve for x
    x = 578,022.02/860.03
  6. Step 6: Final answer
    x = 672.10

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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.