Home / 1,885.79-2,601.50-1,129.21

Finding the Fourth Proportional to 1,885.79, 2,601.50 and 1,129.21

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Solution

The fourth proportional to 1,885.79, 2,601.50 and 1,129.21 is: 1,557.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.79 : 2,601.50 = 1,129.21 : x
  2. Step 2: Convert to fraction form
    1,885.79/2,601.50 = 1,129.21/x
  3. Step 3: Cross multiply
    1,885.79x = 2,601.50 × 1,129.21
  4. Step 4: Simplify right side
    1,885.79x = 2,937,627.67
  5. Step 5: Solve for x
    x = 2,937,627.67/1,885.79
  6. Step 6: Final answer
    x = 1,557.77

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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.