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Finding the Fourth Proportional to 638,730.40, 957,058.80 and 401,648.80

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Solution

The fourth proportional to 638,730.40, 957,058.80 and 401,648.80 is: 601,821.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,730.40 : 957,058.80 = 401,648.80 : x
  2. Step 2: Convert to fraction form
    638,730.40/957,058.80 = 401,648.80/x
  3. Step 3: Cross multiply
    638,730.40x = 957,058.80 × 401,648.80
  4. Step 4: Simplify right side
    638,730.40x = 384,401,518,549.44
  5. Step 5: Solve for x
    x = 384,401,518,549.44/638,730.40
  6. Step 6: Final answer
    x = 601,821.24

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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.