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Finding the Fourth Proportional to 260,417, 390,626.48 and 91,845.77

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Solution

The fourth proportional to 260,417, 390,626.48 and 91,845.77 is: 137,769.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,417 : 390,626.48 = 91,845.77 : x
  2. Step 2: Convert to fraction form
    260,417/390,626.48 = 91,845.77/x
  3. Step 3: Cross multiply
    260,417x = 390,626.48 × 91,845.77
  4. Step 4: Simplify right side
    260,417x = 35,877,389,837.99
  5. Step 5: Solve for x
    x = 35,877,389,837.99/260,417
  6. Step 6: Final answer
    x = 137,769.00

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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.