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Finding the Fourth Proportional to 379.68, 570.72 and 368.16

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Solution

The fourth proportional to 379.68, 570.72 and 368.16 is: 553.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.68 : 570.72 = 368.16 : x
  2. Step 2: Convert to fraction form
    379.68/570.72 = 368.16/x
  3. Step 3: Cross multiply
    379.68x = 570.72 × 368.16
  4. Step 4: Simplify right side
    379.68x = 210,116.28
  5. Step 5: Solve for x
    x = 210,116.28/379.68
  6. Step 6: Final answer
    x = 553.40

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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.