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Finding the Fourth Proportional to 555.84, 767.05 and 307.15

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Solution

The fourth proportional to 555.84, 767.05 and 307.15 is: 423.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.84 : 767.05 = 307.15 : x
  2. Step 2: Convert to fraction form
    555.84/767.05 = 307.15/x
  3. Step 3: Cross multiply
    555.84x = 767.05 × 307.15
  4. Step 4: Simplify right side
    555.84x = 235,596.72
  5. Step 5: Solve for x
    x = 235,596.72/555.84
  6. Step 6: Final answer
    x = 423.86

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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.