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Finding the Fourth Proportional to 286,718.28, 395,695.16 and 159,405.72

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Solution

The fourth proportional to 286,718.28, 395,695.16 and 159,405.72 is: 219,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,718.28 : 395,695.16 = 159,405.72 : x
  2. Step 2: Convert to fraction form
    286,718.28/395,695.16 = 159,405.72/x
  3. Step 3: Cross multiply
    286,718.28x = 395,695.16 × 159,405.72
  4. Step 4: Simplify right side
    286,718.28x = 63,076,071,880.32
  5. Step 5: Solve for x
    x = 63,076,071,880.32/286,718.28
  6. Step 6: Final answer
    x = 219,993.20

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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.