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Finding the Fourth Proportional to 355,397.98, 490,502.64 and 217,659.10

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Solution

The fourth proportional to 355,397.98, 490,502.64 and 217,659.10 is: 300,402.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,397.98 : 490,502.64 = 217,659.10 : x
  2. Step 2: Convert to fraction form
    355,397.98/490,502.64 = 217,659.10/x
  3. Step 3: Cross multiply
    355,397.98x = 490,502.64 × 217,659.10
  4. Step 4: Simplify right side
    355,397.98x = 106,762,363,170.02
  5. Step 5: Solve for x
    x = 106,762,363,170.02/355,397.98
  6. Step 6: Final answer
    x = 300,402.28

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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.