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Finding the Fourth Proportional to 6,448.79, 8,897.78 and 4,090.07

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Solution

The fourth proportional to 6,448.79, 8,897.78 and 4,090.07 is: 5,643.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,448.79 : 8,897.78 = 4,090.07 : x
  2. Step 2: Convert to fraction form
    6,448.79/8,897.78 = 4,090.07/x
  3. Step 3: Cross multiply
    6,448.79x = 8,897.78 × 4,090.07
  4. Step 4: Simplify right side
    6,448.79x = 36,392,522.59
  5. Step 5: Solve for x
    x = 36,392,522.59/6,448.79
  6. Step 6: Final answer
    x = 5,643.31

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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.