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Finding the Fourth Proportional to 420,801.30, 631,201.95 and 263,337.30

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Solution

The fourth proportional to 420,801.30, 631,201.95 and 263,337.30 is: 395,005.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,801.30 : 631,201.95 = 263,337.30 : x
  2. Step 2: Convert to fraction form
    420,801.30/631,201.95 = 263,337.30/x
  3. Step 3: Cross multiply
    420,801.30x = 631,201.95 × 263,337.30
  4. Step 4: Simplify right side
    420,801.30x = 166,219,017,267.74
  5. Step 5: Solve for x
    x = 166,219,017,267.74/420,801.30
  6. Step 6: Final answer
    x = 395,005.95

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1.5x scale

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.