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Finding the Fourth Proportional to 4,720.28, 7,080.38 and 1,210.28

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Solution

The fourth proportional to 4,720.28, 7,080.38 and 1,210.28 is: 1,815.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,720.28 : 7,080.38 = 1,210.28 : x
  2. Step 2: Convert to fraction form
    4,720.28/7,080.38 = 1,210.28/x
  3. Step 3: Cross multiply
    4,720.28x = 7,080.38 × 1,210.28
  4. Step 4: Simplify right side
    4,720.28x = 8,569,242.31
  5. Step 5: Solve for x
    x = 8,569,242.31/4,720.28
  6. Step 6: Final answer
    x = 1,815.41

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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.