Home / 1,585.10-2,186.10-1,187.69

Finding the Fourth Proportional to 1,585.10, 2,186.10 and 1,187.69

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Solution

The fourth proportional to 1,585.10, 2,186.10 and 1,187.69 is: 1,638.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.10 : 2,186.10 = 1,187.69 : x
  2. Step 2: Convert to fraction form
    1,585.10/2,186.10 = 1,187.69/x
  3. Step 3: Cross multiply
    1,585.10x = 2,186.10 × 1,187.69
  4. Step 4: Simplify right side
    1,585.10x = 2,596,398.18
  5. Step 5: Solve for x
    x = 2,596,398.18/1,585.10
  6. Step 6: Final answer
    x = 1,638.01

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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.