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Finding the Fourth Proportional to 556.19, 767.47 and 307.49

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Solution

The fourth proportional to 556.19, 767.47 and 307.49 is: 424.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.19 : 767.47 = 307.49 : x
  2. Step 2: Convert to fraction form
    556.19/767.47 = 307.49/x
  3. Step 3: Cross multiply
    556.19x = 767.47 × 307.49
  4. Step 4: Simplify right side
    556.19x = 235,989.35
  5. Step 5: Solve for x
    x = 235,989.35/556.19
  6. Step 6: Final answer
    x = 424.30

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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.