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Finding the Fourth Proportional to 6,458.40, 9,687.60 and 4,384.80

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Solution

The fourth proportional to 6,458.40, 9,687.60 and 4,384.80 is: 6,577.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,458.40 : 9,687.60 = 4,384.80 : x
  2. Step 2: Convert to fraction form
    6,458.40/9,687.60 = 4,384.80/x
  3. Step 3: Cross multiply
    6,458.40x = 9,687.60 × 4,384.80
  4. Step 4: Simplify right side
    6,458.40x = 42,478,188.48
  5. Step 5: Solve for x
    x = 42,478,188.48/6,458.40
  6. Step 6: Final answer
    x = 6,577.20

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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.