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Finding the Fourth Proportional to 2,947.84, 4,420.14 and 999.28

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Solution

The fourth proportional to 2,947.84, 4,420.14 and 999.28 is: 1,498.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.84 : 4,420.14 = 999.28 : x
  2. Step 2: Convert to fraction form
    2,947.84/4,420.14 = 999.28/x
  3. Step 3: Cross multiply
    2,947.84x = 4,420.14 × 999.28
  4. Step 4: Simplify right side
    2,947.84x = 4,416,957.50
  5. Step 5: Solve for x
    x = 4,416,957.50/2,947.84
  6. Step 6: Final answer
    x = 1,498.37

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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.