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Finding the Fourth Proportional to 2,900.64, 4,002.88 and 1,574.32

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Solution

The fourth proportional to 2,900.64, 4,002.88 and 1,574.32 is: 2,172.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.64 : 4,002.88 = 1,574.32 : x
  2. Step 2: Convert to fraction form
    2,900.64/4,002.88 = 1,574.32/x
  3. Step 3: Cross multiply
    2,900.64x = 4,002.88 × 1,574.32
  4. Step 4: Simplify right side
    2,900.64x = 6,301,814.04
  5. Step 5: Solve for x
    x = 6,301,814.04/2,900.64
  6. Step 6: Final answer
    x = 2,172.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.