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Finding the Fourth Proportional to 387,318.40, 580,977.60 and 246,659.20

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Solution

The fourth proportional to 387,318.40, 580,977.60 and 246,659.20 is: 369,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,318.40 : 580,977.60 = 246,659.20 : x
  2. Step 2: Convert to fraction form
    387,318.40/580,977.60 = 246,659.20/x
  3. Step 3: Cross multiply
    387,318.40x = 580,977.60 × 246,659.20
  4. Step 4: Simplify right side
    387,318.40x = 143,303,470,033.92
  5. Step 5: Solve for x
    x = 143,303,470,033.92/387,318.40
  6. Step 6: Final answer
    x = 369,988.80

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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.