Home / 1,557.30-2,149.08-858.67

Finding the Fourth Proportional to 1,557.30, 2,149.08 and 858.67

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Solution

The fourth proportional to 1,557.30, 2,149.08 and 858.67 is: 1,184.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.30 : 2,149.08 = 858.67 : x
  2. Step 2: Convert to fraction form
    1,557.30/2,149.08 = 858.67/x
  3. Step 3: Cross multiply
    1,557.30x = 2,149.08 × 858.67
  4. Step 4: Simplify right side
    1,557.30x = 1,845,350.52
  5. Step 5: Solve for x
    x = 1,845,350.52/1,557.30
  6. Step 6: Final answer
    x = 1,184.97

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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.