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Finding the Fourth Proportional to 321,890.40, 482,835.60 and 238,946.40

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Solution

The fourth proportional to 321,890.40, 482,835.60 and 238,946.40 is: 358,419.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,890.40 : 482,835.60 = 238,946.40 : x
  2. Step 2: Convert to fraction form
    321,890.40/482,835.60 = 238,946.40/x
  3. Step 3: Cross multiply
    321,890.40x = 482,835.60 × 238,946.40
  4. Step 4: Simplify right side
    321,890.40x = 115,371,828,411.84
  5. Step 5: Solve for x
    x = 115,371,828,411.84/321,890.40
  6. Step 6: Final answer
    x = 358,419.60

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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.