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Finding the Fourth Proportional to 270,345.40, 405,927.70 and 208,086.20

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Solution

The fourth proportional to 270,345.40, 405,927.70 and 208,086.20 is: 312,444.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,345.40 : 405,927.70 = 208,086.20 : x
  2. Step 2: Convert to fraction form
    270,345.40/405,927.70 = 208,086.20/x
  3. Step 3: Cross multiply
    270,345.40x = 405,927.70 × 208,086.20
  4. Step 4: Simplify right side
    270,345.40x = 84,467,952,567.74
  5. Step 5: Solve for x
    x = 84,467,952,567.74/270,345.40
  6. Step 6: Final answer
    x = 312,444.57

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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.