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Finding the Fourth Proportional to 627,081.86, 865,384.35 and 355,206.20

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Solution

The fourth proportional to 627,081.86, 865,384.35 and 355,206.20 is: 490,191.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,081.86 : 865,384.35 = 355,206.20 : x
  2. Step 2: Convert to fraction form
    627,081.86/865,384.35 = 355,206.20/x
  3. Step 3: Cross multiply
    627,081.86x = 865,384.35 × 355,206.20
  4. Step 4: Simplify right side
    627,081.86x = 307,389,882,176.05
  5. Step 5: Solve for x
    x = 307,389,882,176.05/627,081.86
  6. Step 6: Final answer
    x = 490,191.00

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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.