Home / 2,380.15-3,570.84-918.91

Finding the Fourth Proportional to 2,380.15, 3,570.84 and 918.91

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Solution

The fourth proportional to 2,380.15, 3,570.84 and 918.91 is: 1,378.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.15 : 3,570.84 = 918.91 : x
  2. Step 2: Convert to fraction form
    2,380.15/3,570.84 = 918.91/x
  3. Step 3: Cross multiply
    2,380.15x = 3,570.84 × 918.91
  4. Step 4: Simplify right side
    2,380.15x = 3,281,280.58
  5. Step 5: Solve for x
    x = 3,281,280.58/2,380.15
  6. Step 6: Final answer
    x = 1,378.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.