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Finding the Fourth Proportional to 260,309.70, 390,464.55 and 155,247.30

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Solution

The fourth proportional to 260,309.70, 390,464.55 and 155,247.30 is: 232,870.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,309.70 : 390,464.55 = 155,247.30 : x
  2. Step 2: Convert to fraction form
    260,309.70/390,464.55 = 155,247.30/x
  3. Step 3: Cross multiply
    260,309.70x = 390,464.55 × 155,247.30
  4. Step 4: Simplify right side
    260,309.70x = 60,618,567,133.22
  5. Step 5: Solve for x
    x = 60,618,567,133.22/260,309.70
  6. Step 6: Final answer
    x = 232,870.95

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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.