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Finding the Fourth Proportional to 602,878.08, 831,801.31 and 388,142.47

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Solution

The fourth proportional to 602,878.08, 831,801.31 and 388,142.47 is: 535,526.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    602,878.08 : 831,801.31 = 388,142.47 : x
  2. Step 2: Convert to fraction form
    602,878.08/831,801.31 = 388,142.47/x
  3. Step 3: Cross multiply
    602,878.08x = 831,801.31 × 388,142.47
  4. Step 4: Simplify right side
    602,878.08x = 322,857,415,012.64
  5. Step 5: Solve for x
    x = 322,857,415,012.64/602,878.08
  6. Step 6: Final answer
    x = 535,526.88

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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.