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Finding the Fourth Proportional to 354,706.40, 532,059.60 and 105,388.40

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Solution

The fourth proportional to 354,706.40, 532,059.60 and 105,388.40 is: 158,082.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,706.40 : 532,059.60 = 105,388.40 : x
  2. Step 2: Convert to fraction form
    354,706.40/532,059.60 = 105,388.40/x
  3. Step 3: Cross multiply
    354,706.40x = 532,059.60 × 105,388.40
  4. Step 4: Simplify right side
    354,706.40x = 56,072,909,948.64
  5. Step 5: Solve for x
    x = 56,072,909,948.64/354,706.40
  6. Step 6: Final answer
    x = 158,082.60

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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.