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Finding the Fourth Proportional to 6,389.02, 8,808.78 and 4,289.50

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Solution

The fourth proportional to 6,389.02, 8,808.78 and 4,289.50 is: 5,914.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,389.02 : 8,808.78 = 4,289.50 : x
  2. Step 2: Convert to fraction form
    6,389.02/8,808.78 = 4,289.50/x
  3. Step 3: Cross multiply
    6,389.02x = 8,808.78 × 4,289.50
  4. Step 4: Simplify right side
    6,389.02x = 37,785,261.81
  5. Step 5: Solve for x
    x = 37,785,261.81/6,389.02
  6. Step 6: Final answer
    x = 5,914.09

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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.