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Finding the Fourth Proportional to 2,989.52, 4,484.76 and 1,258.40

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Solution

The fourth proportional to 2,989.52, 4,484.76 and 1,258.40 is: 1,887.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.52 : 4,484.76 = 1,258.40 : x
  2. Step 2: Convert to fraction form
    2,989.52/4,484.76 = 1,258.40/x
  3. Step 3: Cross multiply
    2,989.52x = 4,484.76 × 1,258.40
  4. Step 4: Simplify right side
    2,989.52x = 5,643,621.98
  5. Step 5: Solve for x
    x = 5,643,621.98/2,989.52
  6. Step 6: Final answer
    x = 1,887.80

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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.