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Finding the Fourth Proportional to 621,138.80, 931,837.80 and 354,681.20

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Solution

The fourth proportional to 621,138.80, 931,837.80 and 354,681.20 is: 532,095.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,138.80 : 931,837.80 = 354,681.20 : x
  2. Step 2: Convert to fraction form
    621,138.80/931,837.80 = 354,681.20/x
  3. Step 3: Cross multiply
    621,138.80x = 931,837.80 × 354,681.20
  4. Step 4: Simplify right side
    621,138.80x = 330,505,349,109.36
  5. Step 5: Solve for x
    x = 330,505,349,109.36/621,138.80
  6. Step 6: Final answer
    x = 532,095.80

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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.