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Finding the Fourth Proportional to 642,632.87, 886,630.72 and 370,664.30

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Solution

The fourth proportional to 642,632.87, 886,630.72 and 370,664.30 is: 511,399.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,632.87 : 886,630.72 = 370,664.30 : x
  2. Step 2: Convert to fraction form
    642,632.87/886,630.72 = 370,664.30/x
  3. Step 3: Cross multiply
    642,632.87x = 886,630.72 × 370,664.30
  4. Step 4: Simplify right side
    642,632.87x = 328,642,355,187.30
  5. Step 5: Solve for x
    x = 328,642,355,187.30/642,632.87
  6. Step 6: Final answer
    x = 511,399.85

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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.