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Finding the Fourth Proportional to 5,678.88, 7,840.68 and 3,555.24

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Solution

The fourth proportional to 5,678.88, 7,840.68 and 3,555.24 is: 4,908.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.88 : 7,840.68 = 3,555.24 : x
  2. Step 2: Convert to fraction form
    5,678.88/7,840.68 = 3,555.24/x
  3. Step 3: Cross multiply
    5,678.88x = 7,840.68 × 3,555.24
  4. Step 4: Simplify right side
    5,678.88x = 27,875,499.16
  5. Step 5: Solve for x
    x = 27,875,499.16/5,678.88
  6. Step 6: Final answer
    x = 4,908.63

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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.