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Finding the Fourth Proportional to 641,631.40, 963,138.30 and 361,695.40

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Solution

The fourth proportional to 641,631.40, 963,138.30 and 361,695.40 is: 542,932.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,631.40 : 963,138.30 = 361,695.40 : x
  2. Step 2: Convert to fraction form
    641,631.40/963,138.30 = 361,695.40/x
  3. Step 3: Cross multiply
    641,631.40x = 963,138.30 × 361,695.40
  4. Step 4: Simplify right side
    641,631.40x = 348,362,692,673.82
  5. Step 5: Solve for x
    x = 348,362,692,673.82/641,631.40
  6. Step 6: Final answer
    x = 542,932.74

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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.