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Finding the Fourth Proportional to 302,811.20, 455,200.95 and 259,508.60

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Solution

The fourth proportional to 302,811.20, 455,200.95 and 259,508.60 is: 390,106.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,811.20 : 455,200.95 = 259,508.60 : x
  2. Step 2: Convert to fraction form
    302,811.20/455,200.95 = 259,508.60/x
  3. Step 3: Cross multiply
    302,811.20x = 455,200.95 × 259,508.60
  4. Step 4: Simplify right side
    302,811.20x = 118,128,561,253.17
  5. Step 5: Solve for x
    x = 118,128,561,253.17/302,811.20
  6. Step 6: Final answer
    x = 390,106.31

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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.