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Finding the Fourth Proportional to 438,646.80, 657,257.40 and 396,656.40

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Solution

The fourth proportional to 438,646.80, 657,257.40 and 396,656.40 is: 594,340.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,646.80 : 657,257.40 = 396,656.40 : x
  2. Step 2: Convert to fraction form
    438,646.80/657,257.40 = 396,656.40/x
  3. Step 3: Cross multiply
    438,646.80x = 657,257.40 × 396,656.40
  4. Step 4: Simplify right side
    438,646.80x = 260,705,354,157.36
  5. Step 5: Solve for x
    x = 260,705,354,157.36/438,646.80
  6. Step 6: Final answer
    x = 594,340.03

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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.