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Finding the Fourth Proportional to 539,574.80, 809,362.20 and 287,632.40

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Solution

The fourth proportional to 539,574.80, 809,362.20 and 287,632.40 is: 431,448.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,574.80 : 809,362.20 = 287,632.40 : x
  2. Step 2: Convert to fraction form
    539,574.80/809,362.20 = 287,632.40/x
  3. Step 3: Cross multiply
    539,574.80x = 809,362.20 × 287,632.40
  4. Step 4: Simplify right side
    539,574.80x = 232,798,792,055.28
  5. Step 5: Solve for x
    x = 232,798,792,055.28/539,574.80
  6. Step 6: Final answer
    x = 431,448.60

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Similar ratio
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1.5x scale

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.