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Finding the Fourth Proportional to 302,921.70, 455,366.70 and 259,619.10

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Solution

The fourth proportional to 302,921.70, 455,366.70 and 259,619.10 is: 390,272.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,921.70 : 455,366.70 = 259,619.10 : x
  2. Step 2: Convert to fraction form
    302,921.70/455,366.70 = 259,619.10/x
  3. Step 3: Cross multiply
    302,921.70x = 455,366.70 × 259,619.10
  4. Step 4: Simplify right side
    302,921.70x = 118,221,892,823.97
  5. Step 5: Solve for x
    x = 118,221,892,823.97/302,921.70
  6. Step 6: Final answer
    x = 390,272.12

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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.