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Finding the Fourth Proportional to 257,506.61, 355,274.05 and 155,493.31

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Solution

The fourth proportional to 257,506.61, 355,274.05 and 155,493.31 is: 214,529.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,506.61 : 355,274.05 = 155,493.31 : x
  2. Step 2: Convert to fraction form
    257,506.61/355,274.05 = 155,493.31/x
  3. Step 3: Cross multiply
    257,506.61x = 355,274.05 × 155,493.31
  4. Step 4: Simplify right side
    257,506.61x = 55,242,737,172.77
  5. Step 5: Solve for x
    x = 55,242,737,172.77/257,506.61
  6. Step 6: Final answer
    x = 214,529.40

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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.