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Finding the Fourth Proportional to 539,345.80, 809,018.70 and 165,320.20

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Solution

The fourth proportional to 539,345.80, 809,018.70 and 165,320.20 is: 247,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,345.80 : 809,018.70 = 165,320.20 : x
  2. Step 2: Convert to fraction form
    539,345.80/809,018.70 = 165,320.20/x
  3. Step 3: Cross multiply
    539,345.80x = 809,018.70 × 165,320.20
  4. Step 4: Simplify right side
    539,345.80x = 133,747,133,287.74
  5. Step 5: Solve for x
    x = 133,747,133,287.74/539,345.80
  6. Step 6: Final answer
    x = 247,980.30

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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.