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Finding the Fourth Proportional to 399,087.80, 598,631.70 and 370,219.40

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Solution

The fourth proportional to 399,087.80, 598,631.70 and 370,219.40 is: 555,329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,087.80 : 598,631.70 = 370,219.40 : x
  2. Step 2: Convert to fraction form
    399,087.80/598,631.70 = 370,219.40/x
  3. Step 3: Cross multiply
    399,087.80x = 598,631.70 × 370,219.40
  4. Step 4: Simplify right side
    399,087.80x = 221,625,068,794.98
  5. Step 5: Solve for x
    x = 221,625,068,794.98/399,087.80
  6. Step 6: Final answer
    x = 555,329.10

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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.