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Finding the Fourth Proportional to 398,477.23, 549,893.74 and 217,188.60

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Solution

The fourth proportional to 398,477.23, 549,893.74 and 217,188.60 is: 299,717.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,477.23 : 549,893.74 = 217,188.60 : x
  2. Step 2: Convert to fraction form
    398,477.23/549,893.74 = 217,188.60/x
  3. Step 3: Cross multiply
    398,477.23x = 549,893.74 × 217,188.60
  4. Step 4: Simplify right side
    398,477.23x = 119,430,651,539.36
  5. Step 5: Solve for x
    x = 119,430,651,539.36/398,477.23
  6. Step 6: Final answer
    x = 299,717.63

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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.