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Finding the Fourth Proportional to 399,695.60, 599,543.40 and 213,071.60

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Solution

The fourth proportional to 399,695.60, 599,543.40 and 213,071.60 is: 319,607.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,695.60 : 599,543.40 = 213,071.60 : x
  2. Step 2: Convert to fraction form
    399,695.60/599,543.40 = 213,071.60/x
  3. Step 3: Cross multiply
    399,695.60x = 599,543.40 × 213,071.60
  4. Step 4: Simplify right side
    399,695.60x = 127,745,671,507.44
  5. Step 5: Solve for x
    x = 127,745,671,507.44/399,695.60
  6. Step 6: Final answer
    x = 319,607.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.