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Finding the Fourth Proportional to 827,462.15, 1,238,880.72 and 447,019.90

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Solution

The fourth proportional to 827,462.15, 1,238,880.72 and 447,019.90 is: 669,280.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,462.15 : 1,238,880.72 = 447,019.90 : x
  2. Step 2: Convert to fraction form
    827,462.15/1,238,880.72 = 447,019.90/x
  3. Step 3: Cross multiply
    827,462.15x = 1,238,880.72 × 447,019.90
  4. Step 4: Simplify right side
    827,462.15x = 553,804,334,145.45
  5. Step 5: Solve for x
    x = 553,804,334,145.45/827,462.15
  6. Step 6: Final answer
    x = 669,280.56

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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.