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Finding the Fourth Proportional to 405,909.20, 610,030.20 and 354,587.60

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Solution

The fourth proportional to 405,909.20, 610,030.20 and 354,587.60 is: 532,900.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,909.20 : 610,030.20 = 354,587.60 : x
  2. Step 2: Convert to fraction form
    405,909.20/610,030.20 = 354,587.60/x
  3. Step 3: Cross multiply
    405,909.20x = 610,030.20 × 354,587.60
  4. Step 4: Simplify right side
    405,909.20x = 216,309,144,545.52
  5. Step 5: Solve for x
    x = 216,309,144,545.52/405,909.20
  6. Step 6: Final answer
    x = 532,900.32

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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.