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Finding the Fourth Proportional to 556.00, 767.03 and 390.15

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Solution

The fourth proportional to 556.00, 767.03 and 390.15 is: 538.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.00 : 767.03 = 390.15 : x
  2. Step 2: Convert to fraction form
    556.00/767.03 = 390.15/x
  3. Step 3: Cross multiply
    556.00x = 767.03 × 390.15
  4. Step 4: Simplify right side
    556.00x = 299,254.80
  5. Step 5: Solve for x
    x = 299,254.80/556.00
  6. Step 6: Final answer
    x = 538.23

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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.