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Finding the Fourth Proportional to 354,807, 489,653.64 and 203,913.72

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Solution

The fourth proportional to 354,807, 489,653.64 and 203,913.72 is: 281,412.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,807 : 489,653.64 = 203,913.72 : x
  2. Step 2: Convert to fraction form
    354,807/489,653.64 = 203,913.72/x
  3. Step 3: Cross multiply
    354,807x = 489,653.64 × 203,913.72
  4. Step 4: Simplify right side
    354,807x = 99,847,095,243.94
  5. Step 5: Solve for x
    x = 99,847,095,243.94/354,807
  6. Step 6: Final answer
    x = 281,412.42

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1.5x scale

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.