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Finding the Fourth Proportional to 575.66, 794.71 and 390.13

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Solution

The fourth proportional to 575.66, 794.71 and 390.13 is: 538.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.66 : 794.71 = 390.13 : x
  2. Step 2: Convert to fraction form
    575.66/794.71 = 390.13/x
  3. Step 3: Cross multiply
    575.66x = 794.71 × 390.13
  4. Step 4: Simplify right side
    575.66x = 310,038.26
  5. Step 5: Solve for x
    x = 310,038.26/575.66
  6. Step 6: Final answer
    x = 538.58

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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.