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Finding the Fourth Proportional to 303,689.40, 455,663.70 and 145,836.60

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Solution

The fourth proportional to 303,689.40, 455,663.70 and 145,836.60 is: 218,817.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,689.40 : 455,663.70 = 145,836.60 : x
  2. Step 2: Convert to fraction form
    303,689.40/455,663.70 = 145,836.60/x
  3. Step 3: Cross multiply
    303,689.40x = 455,663.70 × 145,836.60
  4. Step 4: Simplify right side
    303,689.40x = 66,452,444,751.42
  5. Step 5: Solve for x
    x = 66,452,444,751.42/303,689.40
  6. Step 6: Final answer
    x = 218,817.14

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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.