Home / 1,557.18-2,148.69-858.60

Finding the Fourth Proportional to 1,557.18, 2,148.69 and 858.60

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Solution

The fourth proportional to 1,557.18, 2,148.69 and 858.60 is: 1,184.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.18 : 2,148.69 = 858.60 : x
  2. Step 2: Convert to fraction form
    1,557.18/2,148.69 = 858.60/x
  3. Step 3: Cross multiply
    1,557.18x = 2,148.69 × 858.60
  4. Step 4: Simplify right side
    1,557.18x = 1,844,865.23
  5. Step 5: Solve for x
    x = 1,844,865.23/1,557.18
  6. Step 6: Final answer
    x = 1,184.75

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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.