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Finding the Fourth Proportional to 260,554.91, 390,860.69 and 83,020.19

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Solution

The fourth proportional to 260,554.91, 390,860.69 and 83,020.19 is: 124,539.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,554.91 : 390,860.69 = 83,020.19 : x
  2. Step 2: Convert to fraction form
    260,554.91/390,860.69 = 83,020.19/x
  3. Step 3: Cross multiply
    260,554.91x = 390,860.69 × 83,020.19
  4. Step 4: Simplify right side
    260,554.91x = 32,449,328,332.23
  5. Step 5: Solve for x
    x = 32,449,328,332.23/260,554.91
  6. Step 6: Final answer
    x = 124,539.31

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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.