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Finding the Fourth Proportional to 6,490.86, 8,957.26 and 3,658.20

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Solution

The fourth proportional to 6,490.86, 8,957.26 and 3,658.20 is: 5,048.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.86 : 8,957.26 = 3,658.20 : x
  2. Step 2: Convert to fraction form
    6,490.86/8,957.26 = 3,658.20/x
  3. Step 3: Cross multiply
    6,490.86x = 8,957.26 × 3,658.20
  4. Step 4: Simplify right side
    6,490.86x = 32,767,448.53
  5. Step 5: Solve for x
    x = 32,767,448.53/6,490.86
  6. Step 6: Final answer
    x = 5,048.24

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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.