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Finding the Fourth Proportional to 405,328.40, 608,050.20 and 124,816.40

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Solution

The fourth proportional to 405,328.40, 608,050.20 and 124,816.40 is: 187,242.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,328.40 : 608,050.20 = 124,816.40 : x
  2. Step 2: Convert to fraction form
    405,328.40/608,050.20 = 124,816.40/x
  3. Step 3: Cross multiply
    405,328.40x = 608,050.20 × 124,816.40
  4. Step 4: Simplify right side
    405,328.40x = 75,894,636,983.28
  5. Step 5: Solve for x
    x = 75,894,636,983.28/405,328.40
  6. Step 6: Final answer
    x = 187,242.34

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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.