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Finding the Fourth Proportional to 612,214.24, 915,635.48 and 545,218.72

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Solution

The fourth proportional to 612,214.24, 915,635.48 and 545,218.72 is: 815,436.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,214.24 : 915,635.48 = 545,218.72 : x
  2. Step 2: Convert to fraction form
    612,214.24/915,635.48 = 545,218.72/x
  3. Step 3: Cross multiply
    612,214.24x = 915,635.48 × 545,218.72
  4. Step 4: Simplify right side
    612,214.24x = 499,221,604,392.19
  5. Step 5: Solve for x
    x = 499,221,604,392.19/612,214.24
  6. Step 6: Final answer
    x = 815,436.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.