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Finding the Fourth Proportional to 309,596.17, 427,289.42 and 188,807.53

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Solution

The fourth proportional to 309,596.17, 427,289.42 and 188,807.53 is: 260,582.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,596.17 : 427,289.42 = 188,807.53 : x
  2. Step 2: Convert to fraction form
    309,596.17/427,289.42 = 188,807.53/x
  3. Step 3: Cross multiply
    309,596.17x = 427,289.42 × 188,807.53
  4. Step 4: Simplify right side
    309,596.17x = 80,675,459,985.33
  5. Step 5: Solve for x
    x = 80,675,459,985.33/309,596.17
  6. Step 6: Final answer
    x = 260,582.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.