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Finding the Fourth Proportional to 606,721.20, 909,995.40 and 207,380.40

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Solution

The fourth proportional to 606,721.20, 909,995.40 and 207,380.40 is: 311,041.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,721.20 : 909,995.40 = 207,380.40 : x
  2. Step 2: Convert to fraction form
    606,721.20/909,995.40 = 207,380.40/x
  3. Step 3: Cross multiply
    606,721.20x = 909,995.40 × 207,380.40
  4. Step 4: Simplify right side
    606,721.20x = 188,715,210,050.16
  5. Step 5: Solve for x
    x = 188,715,210,050.16/606,721.20
  6. Step 6: Final answer
    x = 311,041.07

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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.