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Finding the Fourth Proportional to 456,383.20, 684,639.60 and 140,807.20

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Solution

The fourth proportional to 456,383.20, 684,639.60 and 140,807.20 is: 211,230.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,383.20 : 684,639.60 = 140,807.20 : x
  2. Step 2: Convert to fraction form
    456,383.20/684,639.60 = 140,807.20/x
  3. Step 3: Cross multiply
    456,383.20x = 684,639.60 × 140,807.20
  4. Step 4: Simplify right side
    456,383.20x = 96,402,185,085.12
  5. Step 5: Solve for x
    x = 96,402,185,085.12/456,383.20
  6. Step 6: Final answer
    x = 211,230.79

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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.