Home / 1,586.04-2,187.28-987.77

Finding the Fourth Proportional to 1,586.04, 2,187.28 and 987.77

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Solution

The fourth proportional to 1,586.04, 2,187.28 and 987.77 is: 1,362.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.04 : 2,187.28 = 987.77 : x
  2. Step 2: Convert to fraction form
    1,586.04/2,187.28 = 987.77/x
  3. Step 3: Cross multiply
    1,586.04x = 2,187.28 × 987.77
  4. Step 4: Simplify right side
    1,586.04x = 2,160,529.57
  5. Step 5: Solve for x
    x = 2,160,529.57/1,586.04
  6. Step 6: Final answer
    x = 1,362.22

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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.