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Finding the Fourth Proportional to 368,385.70, 508,186.16 and 215,323.89

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Solution

The fourth proportional to 368,385.70, 508,186.16 and 215,323.89 is: 297,038.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,385.70 : 508,186.16 = 215,323.89 : x
  2. Step 2: Convert to fraction form
    368,385.70/508,186.16 = 215,323.89/x
  3. Step 3: Cross multiply
    368,385.70x = 508,186.16 × 215,323.89
  4. Step 4: Simplify right side
    368,385.70x = 109,424,620,546.21
  5. Step 5: Solve for x
    x = 109,424,620,546.21/368,385.70
  6. Step 6: Final answer
    x = 297,038.19

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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.