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Finding the Fourth Proportional to 307,813.20, 461,719.80 and 130,448.40

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Solution

The fourth proportional to 307,813.20, 461,719.80 and 130,448.40 is: 195,672.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,813.20 : 461,719.80 = 130,448.40 : x
  2. Step 2: Convert to fraction form
    307,813.20/461,719.80 = 130,448.40/x
  3. Step 3: Cross multiply
    307,813.20x = 461,719.80 × 130,448.40
  4. Step 4: Simplify right side
    307,813.20x = 60,230,609,158.32
  5. Step 5: Solve for x
    x = 60,230,609,158.32/307,813.20
  6. Step 6: Final answer
    x = 195,672.60

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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.