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Finding the Fourth Proportional to 606,705.20, 909,971.40 and 207,364.40

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Solution

The fourth proportional to 606,705.20, 909,971.40 and 207,364.40 is: 311,017.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,705.20 : 909,971.40 = 207,364.40 : x
  2. Step 2: Convert to fraction form
    606,705.20/909,971.40 = 207,364.40/x
  3. Step 3: Cross multiply
    606,705.20x = 909,971.40 × 207,364.40
  4. Step 4: Simplify right side
    606,705.20x = 188,695,673,378.16
  5. Step 5: Solve for x
    x = 188,695,673,378.16/606,705.20
  6. Step 6: Final answer
    x = 311,017.07

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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.