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Finding the Fourth Proportional to 368.59, 508.85 and 285.51

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Solution

The fourth proportional to 368.59, 508.85 and 285.51 is: 394.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.59 : 508.85 = 285.51 : x
  2. Step 2: Convert to fraction form
    368.59/508.85 = 285.51/x
  3. Step 3: Cross multiply
    368.59x = 508.85 × 285.51
  4. Step 4: Simplify right side
    368.59x = 145,281.76
  5. Step 5: Solve for x
    x = 145,281.76/368.59
  6. Step 6: Final answer
    x = 394.16

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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.