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Finding the Fourth Proportional to 642,353.80, 963,303.90 and 221,531.80

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Solution

The fourth proportional to 642,353.80, 963,303.90 and 221,531.80 is: 332,219.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,353.80 : 963,303.90 = 221,531.80 : x
  2. Step 2: Convert to fraction form
    642,353.80/963,303.90 = 221,531.80/x
  3. Step 3: Cross multiply
    642,353.80x = 963,303.90 × 221,531.80
  4. Step 4: Simplify right side
    642,353.80x = 213,402,446,914.02
  5. Step 5: Solve for x
    x = 213,402,446,914.02/642,353.80
  6. Step 6: Final answer
    x = 332,219.48

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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.