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Finding the Fourth Proportional to 709,135.80, 978,606.06 and 386,845.81

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Solution

The fourth proportional to 709,135.80, 978,606.06 and 386,845.81 is: 533,846.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,135.80 : 978,606.06 = 386,845.81 : x
  2. Step 2: Convert to fraction form
    709,135.80/978,606.06 = 386,845.81/x
  3. Step 3: Cross multiply
    709,135.80x = 978,606.06 × 386,845.81
  4. Step 4: Simplify right side
    709,135.80x = 378,569,650,054.42
  5. Step 5: Solve for x
    x = 378,569,650,054.42/709,135.80
  6. Step 6: Final answer
    x = 533,846.48

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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.