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Finding the Fourth Proportional to 5,490.42, 8,235.63 and 4,389.63

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Solution

The fourth proportional to 5,490.42, 8,235.63 and 4,389.63 is: 6,584.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490.42 : 8,235.63 = 4,389.63 : x
  2. Step 2: Convert to fraction form
    5,490.42/8,235.63 = 4,389.63/x
  3. Step 3: Cross multiply
    5,490.42x = 8,235.63 × 4,389.63
  4. Step 4: Simplify right side
    5,490.42x = 36,151,368.52
  5. Step 5: Solve for x
    x = 36,151,368.52/5,490.42
  6. Step 6: Final answer
    x = 6,584.45

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Half scale
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Double scale
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Similar ratio
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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.