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Finding the Fourth Proportional to 614,801.90, 921,218.70 and 404,193.80

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Solution

The fourth proportional to 614,801.90, 921,218.70 and 404,193.80 is: 605,643.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,801.90 : 921,218.70 = 404,193.80 : x
  2. Step 2: Convert to fraction form
    614,801.90/921,218.70 = 404,193.80/x
  3. Step 3: Cross multiply
    614,801.90x = 921,218.70 × 404,193.80
  4. Step 4: Simplify right side
    614,801.90x = 372,350,886,984.06
  5. Step 5: Solve for x
    x = 372,350,886,984.06/614,801.90
  6. Step 6: Final answer
    x = 605,643.68

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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.