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Finding the Fourth Proportional to 442,908.90, 664,363.35 and 425,412.90

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Solution

The fourth proportional to 442,908.90, 664,363.35 and 425,412.90 is: 638,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,908.90 : 664,363.35 = 425,412.90 : x
  2. Step 2: Convert to fraction form
    442,908.90/664,363.35 = 425,412.90/x
  3. Step 3: Cross multiply
    442,908.90x = 664,363.35 × 425,412.90
  4. Step 4: Simplify right side
    442,908.90x = 282,628,739,377.22
  5. Step 5: Solve for x
    x = 282,628,739,377.22/442,908.90
  6. Step 6: Final answer
    x = 638,119.35

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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.