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Finding the Fourth Proportional to 641,628.40, 963,133.80 and 361,692.40

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Solution

The fourth proportional to 641,628.40, 963,133.80 and 361,692.40 is: 542,928.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,628.40 : 963,133.80 = 361,692.40 : x
  2. Step 2: Convert to fraction form
    641,628.40/963,133.80 = 361,692.40/x
  3. Step 3: Cross multiply
    641,628.40x = 963,133.80 × 361,692.40
  4. Step 4: Simplify right side
    641,628.40x = 348,358,175,643.12
  5. Step 5: Solve for x
    x = 348,358,175,643.12/641,628.40
  6. Step 6: Final answer
    x = 542,928.24

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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.