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Finding the Fourth Proportional to 357,330.96, 492,959.52 and 221,328.72

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Solution

The fourth proportional to 357,330.96, 492,959.52 and 221,328.72 is: 305,336.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,330.96 : 492,959.52 = 221,328.72 : x
  2. Step 2: Convert to fraction form
    357,330.96/492,959.52 = 221,328.72/x
  3. Step 3: Cross multiply
    357,330.96x = 492,959.52 × 221,328.72
  4. Step 4: Simplify right side
    357,330.96x = 109,106,099,573.41
  5. Step 5: Solve for x
    x = 109,106,099,573.41/357,330.96
  6. Step 6: Final answer
    x = 305,336.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.