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Finding the Fourth Proportional to 556.28, 767.61 and 307.59

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Solution

The fourth proportional to 556.28, 767.61 and 307.59 is: 424.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.28 : 767.61 = 307.59 : x
  2. Step 2: Convert to fraction form
    556.28/767.61 = 307.59/x
  3. Step 3: Cross multiply
    556.28x = 767.61 × 307.59
  4. Step 4: Simplify right side
    556.28x = 236,109.16
  5. Step 5: Solve for x
    x = 236,109.16/556.28
  6. Step 6: Final answer
    x = 424.45

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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.