Home / 642,642.23-886,608.91-384,525.20

Finding the Fourth Proportional to 642,642.23, 886,608.91 and 384,525.20

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Solution

The fourth proportional to 642,642.23, 886,608.91 and 384,525.20 is: 530,502.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,642.23 : 886,608.91 = 384,525.20 : x
  2. Step 2: Convert to fraction form
    642,642.23/886,608.91 = 384,525.20/x
  3. Step 3: Cross multiply
    642,642.23x = 886,608.91 × 384,525.20
  4. Step 4: Simplify right side
    642,642.23x = 340,923,468,439.53
  5. Step 5: Solve for x
    x = 340,923,468,439.53/642,642.23
  6. Step 6: Final answer
    x = 530,502.75

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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.