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Finding the Fourth Proportional to 386,703.79, 533,654.87 and 216,941.56

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Solution

The fourth proportional to 386,703.79, 533,654.87 and 216,941.56 is: 299,381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,703.79 : 533,654.87 = 216,941.56 : x
  2. Step 2: Convert to fraction form
    386,703.79/533,654.87 = 216,941.56/x
  3. Step 3: Cross multiply
    386,703.79x = 533,654.87 × 216,941.56
  4. Step 4: Simplify right side
    386,703.79x = 115,771,919,999.40
  5. Step 5: Solve for x
    x = 115,771,919,999.40/386,703.79
  6. Step 6: Final answer
    x = 299,381.39

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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.