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Finding the Fourth Proportional to 388.07, 581.86 and 156.77

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Solution

The fourth proportional to 388.07, 581.86 and 156.77 is: 235.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.07 : 581.86 = 156.77 : x
  2. Step 2: Convert to fraction form
    388.07/581.86 = 156.77/x
  3. Step 3: Cross multiply
    388.07x = 581.86 × 156.77
  4. Step 4: Simplify right side
    388.07x = 91,214.50
  5. Step 5: Solve for x
    x = 91,214.50/388.07
  6. Step 6: Final answer
    x = 235.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.