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Finding the Fourth Proportional to 368,059.72, 507,887.40 and 215,133.76

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Solution

The fourth proportional to 368,059.72, 507,887.40 and 215,133.76 is: 296,864.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,059.72 : 507,887.40 = 215,133.76 : x
  2. Step 2: Convert to fraction form
    368,059.72/507,887.40 = 215,133.76/x
  3. Step 3: Cross multiply
    368,059.72x = 507,887.40 × 215,133.76
  4. Step 4: Simplify right side
    368,059.72x = 109,263,726,018.62
  5. Step 5: Solve for x
    x = 109,263,726,018.62/368,059.72
  6. Step 6: Final answer
    x = 296,864.12

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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.