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Finding the Fourth Proportional to 303,514.60, 455,271.90 and 145,661.80

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Solution

The fourth proportional to 303,514.60, 455,271.90 and 145,661.80 is: 218,492.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,514.60 : 455,271.90 = 145,661.80 : x
  2. Step 2: Convert to fraction form
    303,514.60/455,271.90 = 145,661.80/x
  3. Step 3: Cross multiply
    303,514.60x = 455,271.90 × 145,661.80
  4. Step 4: Simplify right side
    303,514.60x = 66,315,724,443.42
  5. Step 5: Solve for x
    x = 66,315,724,443.42/303,514.60
  6. Step 6: Final answer
    x = 218,492.70

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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.