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Finding the Fourth Proportional to 526.90, 727.14 and 290.86

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Solution

The fourth proportional to 526.90, 727.14 and 290.86 is: 401.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.90 : 727.14 = 290.86 : x
  2. Step 2: Convert to fraction form
    526.90/727.14 = 290.86/x
  3. Step 3: Cross multiply
    526.90x = 727.14 × 290.86
  4. Step 4: Simplify right side
    526.90x = 211,495.94
  5. Step 5: Solve for x
    x = 211,495.94/526.90
  6. Step 6: Final answer
    x = 401.40

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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.