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Finding the Fourth Proportional to 370,505.25, 511,290.55 and 209,356.83

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Solution

The fourth proportional to 370,505.25, 511,290.55 and 209,356.83 is: 288,908.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,505.25 : 511,290.55 = 209,356.83 : x
  2. Step 2: Convert to fraction form
    370,505.25/511,290.55 = 209,356.83/x
  3. Step 3: Cross multiply
    370,505.25x = 511,290.55 × 209,356.83
  4. Step 4: Simplify right side
    370,505.25x = 107,042,168,756.96
  5. Step 5: Solve for x
    x = 107,042,168,756.96/370,505.25
  6. Step 6: Final answer
    x = 288,908.64

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1.5x scale

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.