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Finding the Fourth Proportional to 307,985.80, 461,898.50 and 130,401.40

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Solution

The fourth proportional to 307,985.80, 461,898.50 and 130,401.40 is: 195,568.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,985.80 : 461,898.50 = 130,401.40 : x
  2. Step 2: Convert to fraction form
    307,985.80/461,898.50 = 130,401.40/x
  3. Step 3: Cross multiply
    307,985.80x = 461,898.50 × 130,401.40
  4. Step 4: Simplify right side
    307,985.80x = 60,232,211,057.90
  5. Step 5: Solve for x
    x = 60,232,211,057.90/307,985.80
  6. Step 6: Final answer
    x = 195,568.14

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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.