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Finding the Fourth Proportional to 284,163.32, 392,128.62 and 156,835.64

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Solution

The fourth proportional to 284,163.32, 392,128.62 and 156,835.64 is: 216,423.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,163.32 : 392,128.62 = 156,835.64 : x
  2. Step 2: Convert to fraction form
    284,163.32/392,128.62 = 156,835.64/x
  3. Step 3: Cross multiply
    284,163.32x = 392,128.62 × 156,835.64
  4. Step 4: Simplify right side
    284,163.32x = 61,499,743,080.02
  5. Step 5: Solve for x
    x = 61,499,743,080.02/284,163.32
  6. Step 6: Final answer
    x = 216,423.93

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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.