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Finding the Fourth Proportional to 642,226.32, 963,638.37 and 287,480.34

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Solution

The fourth proportional to 642,226.32, 963,638.37 and 287,480.34 is: 431,354.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,226.32 : 963,638.37 = 287,480.34 : x
  2. Step 2: Convert to fraction form
    642,226.32/963,638.37 = 287,480.34/x
  3. Step 3: Cross multiply
    642,226.32x = 963,638.37 × 287,480.34
  4. Step 4: Simplify right side
    642,226.32x = 277,027,086,244.65
  5. Step 5: Solve for x
    x = 277,027,086,244.65/642,226.32
  6. Step 6: Final answer
    x = 431,354.30

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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.