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Finding the Fourth Proportional to 917.19, 1,374.84 and 369

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Solution

The fourth proportional to 917.19, 1,374.84 and 369 is: 553.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.19 : 1,374.84 = 369 : x
  2. Step 2: Convert to fraction form
    917.19/1,374.84 = 369/x
  3. Step 3: Cross multiply
    917.19x = 1,374.84 × 369
  4. Step 4: Simplify right side
    917.19x = 507,315.96
  5. Step 5: Solve for x
    x = 507,315.96/917.19
  6. Step 6: Final answer
    x = 553.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.