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Finding the Fourth Proportional to 505,445.81, 697,435.94 and 290,545.73

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Solution

The fourth proportional to 505,445.81, 697,435.94 and 290,545.73 is: 400,907.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,445.81 : 697,435.94 = 290,545.73 : x
  2. Step 2: Convert to fraction form
    505,445.81/697,435.94 = 290,545.73/x
  3. Step 3: Cross multiply
    505,445.81x = 697,435.94 × 290,545.73
  4. Step 4: Simplify right side
    505,445.81x = 202,637,031,554.72
  5. Step 5: Solve for x
    x = 202,637,031,554.72/505,445.81
  6. Step 6: Final answer
    x = 400,907.53

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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.