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Finding the Fourth Proportional to 284,866.71, 393,100.05 and 155,779.56

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Solution

The fourth proportional to 284,866.71, 393,100.05 and 155,779.56 is: 214,967.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,866.71 : 393,100.05 = 155,779.56 : x
  2. Step 2: Convert to fraction form
    284,866.71/393,100.05 = 155,779.56/x
  3. Step 3: Cross multiply
    284,866.71x = 393,100.05 × 155,779.56
  4. Step 4: Simplify right side
    284,866.71x = 61,236,952,824.98
  5. Step 5: Solve for x
    x = 61,236,952,824.98/284,866.71
  6. Step 6: Final answer
    x = 214,967.04

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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.