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Finding the Fourth Proportional to 630,376.08, 869,671.38 and 388,238.43

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Solution

The fourth proportional to 630,376.08, 869,671.38 and 388,238.43 is: 535,616.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,376.08 : 869,671.38 = 388,238.43 : x
  2. Step 2: Convert to fraction form
    630,376.08/869,671.38 = 388,238.43/x
  3. Step 3: Cross multiply
    630,376.08x = 869,671.38 × 388,238.43
  4. Step 4: Simplify right side
    630,376.08x = 337,639,851,187.13
  5. Step 5: Solve for x
    x = 337,639,851,187.13/630,376.08
  6. Step 6: Final answer
    x = 535,616.53

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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.