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Finding the Fourth Proportional to 1,574.72, 2,360.24 and 989.85

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Solution

The fourth proportional to 1,574.72, 2,360.24 and 989.85 is: 1,483.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,574.72 : 2,360.24 = 989.85 : x
  2. Step 2: Convert to fraction form
    1,574.72/2,360.24 = 989.85/x
  3. Step 3: Cross multiply
    1,574.72x = 2,360.24 × 989.85
  4. Step 4: Simplify right side
    1,574.72x = 2,336,271.26
  5. Step 5: Solve for x
    x = 2,336,271.26/1,574.72
  6. Step 6: Final answer
    x = 1,483.61

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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.