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Finding the Fourth Proportional to 303,539.60, 455,309.40 and 145,686.80

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Solution

The fourth proportional to 303,539.60, 455,309.40 and 145,686.80 is: 218,530.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,539.60 : 455,309.40 = 145,686.80 : x
  2. Step 2: Convert to fraction form
    303,539.60/455,309.40 = 145,686.80/x
  3. Step 3: Cross multiply
    303,539.60x = 455,309.40 × 145,686.80
  4. Step 4: Simplify right side
    303,539.60x = 66,332,569,495.92
  5. Step 5: Solve for x
    x = 66,332,569,495.92/303,539.60
  6. Step 6: Final answer
    x = 218,530.20

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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.