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Finding the Fourth Proportional to 260,464.01, 390,704.21 and 89,683.91

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Solution

The fourth proportional to 260,464.01, 390,704.21 and 89,683.91 is: 134,528.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,464.01 : 390,704.21 = 89,683.91 : x
  2. Step 2: Convert to fraction form
    260,464.01/390,704.21 = 89,683.91/x
  3. Step 3: Cross multiply
    260,464.01x = 390,704.21 × 89,683.91
  4. Step 4: Simplify right side
    260,464.01x = 35,039,880,605.78
  5. Step 5: Solve for x
    x = 35,039,880,605.78/260,464.01
  6. Step 6: Final answer
    x = 134,528.69

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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.