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Finding the Fourth Proportional to 612,768.60, 919,152.90 and 545,117.40

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Solution

The fourth proportional to 612,768.60, 919,152.90 and 545,117.40 is: 817,676.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,768.60 : 919,152.90 = 545,117.40 : x
  2. Step 2: Convert to fraction form
    612,768.60/919,152.90 = 545,117.40/x
  3. Step 3: Cross multiply
    612,768.60x = 919,152.90 × 545,117.40
  4. Step 4: Simplify right side
    612,768.60x = 501,046,239,050.46
  5. Step 5: Solve for x
    x = 501,046,239,050.46/612,768.60
  6. Step 6: Final answer
    x = 817,676.10

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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.