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Finding the Fourth Proportional to 309,639.80, 464,459.70 and 262,400.60

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Solution

The fourth proportional to 309,639.80, 464,459.70 and 262,400.60 is: 393,600.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,639.80 : 464,459.70 = 262,400.60 : x
  2. Step 2: Convert to fraction form
    309,639.80/464,459.70 = 262,400.60/x
  3. Step 3: Cross multiply
    309,639.80x = 464,459.70 × 262,400.60
  4. Step 4: Simplify right side
    309,639.80x = 121,874,503,955.82
  5. Step 5: Solve for x
    x = 121,874,503,955.82/309,639.80
  6. Step 6: Final answer
    x = 393,600.90

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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.