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Finding the Fourth Proportional to 260,506.81, 390,760.21 and 73,518.31

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Solution

The fourth proportional to 260,506.81, 390,760.21 and 73,518.31 is: 110,277.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,506.81 : 390,760.21 = 73,518.31 : x
  2. Step 2: Convert to fraction form
    260,506.81/390,760.21 = 73,518.31/x
  3. Step 3: Cross multiply
    260,506.81x = 390,760.21 × 73,518.31
  4. Step 4: Simplify right side
    260,506.81x = 28,728,030,254.45
  5. Step 5: Solve for x
    x = 28,728,030,254.45/260,506.81
  6. Step 6: Final answer
    x = 110,277.46

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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.