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Finding the Fourth Proportional to 365,664.99, 548,399.21 and 128,976.51

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Solution

The fourth proportional to 365,664.99, 548,399.21 and 128,976.51 is: 193,430.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,664.99 : 548,399.21 = 128,976.51 : x
  2. Step 2: Convert to fraction form
    365,664.99/548,399.21 = 128,976.51/x
  3. Step 3: Cross multiply
    365,664.99x = 548,399.21 × 128,976.51
  4. Step 4: Simplify right side
    365,664.99x = 70,730,615,547.67
  5. Step 5: Solve for x
    x = 70,730,615,547.67/365,664.99
  6. Step 6: Final answer
    x = 193,430.10

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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.