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Finding the Fourth Proportional to 642,262.84, 886,311.12 and 355,782.04

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Solution

The fourth proportional to 642,262.84, 886,311.12 and 355,782.04 is: 490,972.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,262.84 : 886,311.12 = 355,782.04 : x
  2. Step 2: Convert to fraction form
    642,262.84/886,311.12 = 355,782.04/x
  3. Step 3: Cross multiply
    642,262.84x = 886,311.12 × 355,782.04
  4. Step 4: Simplify right side
    642,262.84x = 315,333,578,348.29
  5. Step 5: Solve for x
    x = 315,333,578,348.29/642,262.84
  6. Step 6: Final answer
    x = 490,972.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.