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Finding the Fourth Proportional to 405,064.40, 606,430.20 and 247,600.40

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Solution

The fourth proportional to 405,064.40, 606,430.20 and 247,600.40 is: 370,687.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,064.40 : 606,430.20 = 247,600.40 : x
  2. Step 2: Convert to fraction form
    405,064.40/606,430.20 = 247,600.40/x
  3. Step 3: Cross multiply
    405,064.40x = 606,430.20 × 247,600.40
  4. Step 4: Simplify right side
    405,064.40x = 150,152,360,092.08
  5. Step 5: Solve for x
    x = 150,152,360,092.08/405,064.40
  6. Step 6: Final answer
    x = 370,687.62

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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.