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Finding the Fourth Proportional to 259,798.48, 389,715.32 and 91,298.32

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Solution

The fourth proportional to 259,798.48, 389,715.32 and 91,298.32 is: 136,953.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,798.48 : 389,715.32 = 91,298.32 : x
  2. Step 2: Convert to fraction form
    259,798.48/389,715.32 = 91,298.32/x
  3. Step 3: Cross multiply
    259,798.48x = 389,715.32 × 91,298.32
  4. Step 4: Simplify right side
    259,798.48x = 35,580,353,994.26
  5. Step 5: Solve for x
    x = 35,580,353,994.26/259,798.48
  6. Step 6: Final answer
    x = 136,953.66

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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.