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Finding the Fourth Proportional to 668,005.82, 921,946.52 and 423,012.94

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Solution

The fourth proportional to 668,005.82, 921,946.52 and 423,012.94 is: 583,820.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,005.82 : 921,946.52 = 423,012.94 : x
  2. Step 2: Convert to fraction form
    668,005.82/921,946.52 = 423,012.94/x
  3. Step 3: Cross multiply
    668,005.82x = 921,946.52 × 423,012.94
  4. Step 4: Simplify right side
    668,005.82x = 389,995,307,947.97
  5. Step 5: Solve for x
    x = 389,995,307,947.97/668,005.82
  6. Step 6: Final answer
    x = 583,820.22

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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.