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Finding the Fourth Proportional to 436,762.64, 655,143.76 and 121,219.45

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Solution

The fourth proportional to 436,762.64, 655,143.76 and 121,219.45 is: 181,829.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,762.64 : 655,143.76 = 121,219.45 : x
  2. Step 2: Convert to fraction form
    436,762.64/655,143.76 = 121,219.45/x
  3. Step 3: Cross multiply
    436,762.64x = 655,143.76 × 121,219.45
  4. Step 4: Simplify right side
    436,762.64x = 79,416,166,258.13
  5. Step 5: Solve for x
    x = 79,416,166,258.13/436,762.64
  6. Step 6: Final answer
    x = 181,829.12

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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.