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Finding the Fourth Proportional to 5,266.60, 7,890.30 and 4,287.40

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Solution

The fourth proportional to 5,266.60, 7,890.30 and 4,287.40 is: 6,423.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,266.60 : 7,890.30 = 4,287.40 : x
  2. Step 2: Convert to fraction form
    5,266.60/7,890.30 = 4,287.40/x
  3. Step 3: Cross multiply
    5,266.60x = 7,890.30 × 4,287.40
  4. Step 4: Simplify right side
    5,266.60x = 33,828,872.22
  5. Step 5: Solve for x
    x = 33,828,872.22/5,266.60
  6. Step 6: Final answer
    x = 6,423.28

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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.