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Finding the Fourth Proportional to 6,440.64, 8,888.16 and 3,646.08

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Solution

The fourth proportional to 6,440.64, 8,888.16 and 3,646.08 is: 5,031.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,440.64 : 8,888.16 = 3,646.08 : x
  2. Step 2: Convert to fraction form
    6,440.64/8,888.16 = 3,646.08/x
  3. Step 3: Cross multiply
    6,440.64x = 8,888.16 × 3,646.08
  4. Step 4: Simplify right side
    6,440.64x = 32,406,942.41
  5. Step 5: Solve for x
    x = 32,406,942.41/6,440.64
  6. Step 6: Final answer
    x = 5,031.63

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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.