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Finding the Fourth Proportional to 302,941.70, 455,396.70 and 259,639.10

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Solution

The fourth proportional to 302,941.70, 455,396.70 and 259,639.10 is: 390,302.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,941.70 : 455,396.70 = 259,639.10 : x
  2. Step 2: Convert to fraction form
    302,941.70/455,396.70 = 259,639.10/x
  3. Step 3: Cross multiply
    302,941.70x = 455,396.70 × 259,639.10
  4. Step 4: Simplify right side
    302,941.70x = 118,238,789,330.97
  5. Step 5: Solve for x
    x = 118,238,789,330.97/302,941.70
  6. Step 6: Final answer
    x = 390,302.13

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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.