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Finding the Fourth Proportional to 260,003.58, 390,063.69 and 86,908.31

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Solution

The fourth proportional to 260,003.58, 390,063.69 and 86,908.31 is: 130,381.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,003.58 : 390,063.69 = 86,908.31 : x
  2. Step 2: Convert to fraction form
    260,003.58/390,063.69 = 86,908.31/x
  3. Step 3: Cross multiply
    260,003.58x = 390,063.69 × 86,908.31
  4. Step 4: Simplify right side
    260,003.58x = 33,899,774,139.95
  5. Step 5: Solve for x
    x = 33,899,774,139.95/260,003.58
  6. Step 6: Final answer
    x = 130,381.95

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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.