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Finding the Fourth Proportional to 4,721.79, 7,080.45 and 1,434.21

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Solution

The fourth proportional to 4,721.79, 7,080.45 and 1,434.21 is: 2,150.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,721.79 : 7,080.45 = 1,434.21 : x
  2. Step 2: Convert to fraction form
    4,721.79/7,080.45 = 1,434.21/x
  3. Step 3: Cross multiply
    4,721.79x = 7,080.45 × 1,434.21
  4. Step 4: Simplify right side
    4,721.79x = 10,154,852.19
  5. Step 5: Solve for x
    x = 10,154,852.19/4,721.79
  6. Step 6: Final answer
    x = 2,150.64

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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.