Home / 1,557.30-2,148.96-928.05

Finding the Fourth Proportional to 1,557.30, 2,148.96 and 928.05

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Solution

The fourth proportional to 1,557.30, 2,148.96 and 928.05 is: 1,280.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.30 : 2,148.96 = 928.05 : x
  2. Step 2: Convert to fraction form
    1,557.30/2,148.96 = 928.05/x
  3. Step 3: Cross multiply
    1,557.30x = 2,148.96 × 928.05
  4. Step 4: Simplify right side
    1,557.30x = 1,994,342.33
  5. Step 5: Solve for x
    x = 1,994,342.33/1,557.30
  6. Step 6: Final answer
    x = 1,280.64

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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.