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Finding the Fourth Proportional to 398,479.23, 549,896.51 and 217,190.60

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Solution

The fourth proportional to 398,479.23, 549,896.51 and 217,190.60 is: 299,720.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,479.23 : 549,896.51 = 217,190.60 : x
  2. Step 2: Convert to fraction form
    398,479.23/549,896.51 = 217,190.60/x
  3. Step 3: Cross multiply
    398,479.23x = 549,896.51 × 217,190.60
  4. Step 4: Simplify right side
    398,479.23x = 119,432,349,109.37
  5. Step 5: Solve for x
    x = 119,432,349,109.37/398,479.23
  6. Step 6: Final answer
    x = 299,720.39

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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.