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Finding the Fourth Proportional to 642,189.87, 886,282.00 and 355,710.17

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Solution

The fourth proportional to 642,189.87, 886,282.00 and 355,710.17 is: 490,913.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,189.87 : 886,282.00 = 355,710.17 : x
  2. Step 2: Convert to fraction form
    642,189.87/886,282.00 = 355,710.17/x
  3. Step 3: Cross multiply
    642,189.87x = 886,282.00 × 355,710.17
  4. Step 4: Simplify right side
    642,189.87x = 315,259,522,214.37
  5. Step 5: Solve for x
    x = 315,259,522,214.37/642,189.87
  6. Step 6: Final answer
    x = 490,913.26

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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.