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Finding the Fourth Proportional to 388,861.97, 536,646.06 and 216,779.90

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Solution

The fourth proportional to 388,861.97, 536,646.06 and 216,779.90 is: 299,165.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,861.97 : 536,646.06 = 216,779.90 : x
  2. Step 2: Convert to fraction form
    388,861.97/536,646.06 = 216,779.90/x
  3. Step 3: Cross multiply
    388,861.97x = 536,646.06 × 216,779.90
  4. Step 4: Simplify right side
    388,861.97x = 116,334,076,538.96
  5. Step 5: Solve for x
    x = 116,334,076,538.96/388,861.97
  6. Step 6: Final answer
    x = 299,165.48

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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.