Home / 642,020.40-963,145.80-268,081.20

Finding the Fourth Proportional to 642,020.40, 963,145.80 and 268,081.20

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Solution

The fourth proportional to 642,020.40, 963,145.80 and 268,081.20 is: 402,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,020.40 : 963,145.80 = 268,081.20 : x
  2. Step 2: Convert to fraction form
    642,020.40/963,145.80 = 268,081.20/x
  3. Step 3: Cross multiply
    642,020.40x = 963,145.80 × 268,081.20
  4. Step 4: Simplify right side
    642,020.40x = 258,201,281,838.96
  5. Step 5: Solve for x
    x = 258,201,281,838.96/642,020.40
  6. Step 6: Final answer
    x = 402,169.90

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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.