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Finding the Fourth Proportional to 399,695.40, 598,558.95 and 189,087.30

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Solution

The fourth proportional to 399,695.40, 598,558.95 and 189,087.30 is: 283,165.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,695.40 : 598,558.95 = 189,087.30 : x
  2. Step 2: Convert to fraction form
    399,695.40/598,558.95 = 189,087.30/x
  3. Step 3: Cross multiply
    399,695.40x = 598,558.95 × 189,087.30
  4. Step 4: Simplify right side
    399,695.40x = 113,179,895,746.34
  5. Step 5: Solve for x
    x = 113,179,895,746.34/399,695.40
  6. Step 6: Final answer
    x = 283,165.37

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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.