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Finding the Fourth Proportional to 302,811.70, 455,201.70 and 259,509.10

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Solution

The fourth proportional to 302,811.70, 455,201.70 and 259,509.10 is: 390,107.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,811.70 : 455,201.70 = 259,509.10 : x
  2. Step 2: Convert to fraction form
    302,811.70/455,201.70 = 259,509.10/x
  3. Step 3: Cross multiply
    302,811.70x = 455,201.70 × 259,509.10
  4. Step 4: Simplify right side
    302,811.70x = 118,128,983,485.47
  5. Step 5: Solve for x
    x = 118,128,983,485.47/302,811.70
  6. Step 6: Final answer
    x = 390,107.06

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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.