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Finding the Fourth Proportional to 274,259.72, 378,513.47 and 153,407.72

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Solution

The fourth proportional to 274,259.72, 378,513.47 and 153,407.72 is: 211,722.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,259.72 : 378,513.47 = 153,407.72 : x
  2. Step 2: Convert to fraction form
    274,259.72/378,513.47 = 153,407.72/x
  3. Step 3: Cross multiply
    274,259.72x = 378,513.47 × 153,407.72
  4. Step 4: Simplify right side
    274,259.72x = 58,066,888,421.99
  5. Step 5: Solve for x
    x = 58,066,888,421.99/274,259.72
  6. Step 6: Final answer
    x = 211,722.26

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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.