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Finding the Fourth Proportional to 351,455.94, 485,056.89 and 215,570.34

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Solution

The fourth proportional to 351,455.94, 485,056.89 and 215,570.34 is: 297,516.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,455.94 : 485,056.89 = 215,570.34 : x
  2. Step 2: Convert to fraction form
    351,455.94/485,056.89 = 215,570.34/x
  3. Step 3: Cross multiply
    351,455.94x = 485,056.89 × 215,570.34
  4. Step 4: Simplify right side
    351,455.94x = 104,563,878,696.64
  5. Step 5: Solve for x
    x = 104,563,878,696.64/351,455.94
  6. Step 6: Final answer
    x = 297,516.32

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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.