Home / 260,285.40-390,428.10-82,810.35

Finding the Fourth Proportional to 260,285.40, 390,428.10 and 82,810.35

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Solution

The fourth proportional to 260,285.40, 390,428.10 and 82,810.35 is: 124,215.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,285.40 : 390,428.10 = 82,810.35 : x
  2. Step 2: Convert to fraction form
    260,285.40/390,428.10 = 82,810.35/x
  3. Step 3: Cross multiply
    260,285.40x = 390,428.10 × 82,810.35
  4. Step 4: Simplify right side
    260,285.40x = 32,331,487,610.84
  5. Step 5: Solve for x
    x = 32,331,487,610.84/260,285.40
  6. Step 6: Final answer
    x = 124,215.53

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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.