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Finding the Fourth Proportional to 305,437.77, 420,009.43 and 265,081.47

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Solution

The fourth proportional to 305,437.77, 420,009.43 and 265,081.47 is: 364,515.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,437.77 : 420,009.43 = 265,081.47 : x
  2. Step 2: Convert to fraction form
    305,437.77/420,009.43 = 265,081.47/x
  3. Step 3: Cross multiply
    305,437.77x = 420,009.43 × 265,081.47
  4. Step 4: Simplify right side
    305,437.77x = 111,336,715,018.22
  5. Step 5: Solve for x
    x = 111,336,715,018.22/305,437.77
  6. Step 6: Final answer
    x = 364,515.22

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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.