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Finding the Fourth Proportional to 303,390.40, 455,085.60 and 81,774.40

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Solution

The fourth proportional to 303,390.40, 455,085.60 and 81,774.40 is: 122,661.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,390.40 : 455,085.60 = 81,774.40 : x
  2. Step 2: Convert to fraction form
    303,390.40/455,085.60 = 81,774.40/x
  3. Step 3: Cross multiply
    303,390.40x = 455,085.60 × 81,774.40
  4. Step 4: Simplify right side
    303,390.40x = 37,214,351,888.64
  5. Step 5: Solve for x
    x = 37,214,351,888.64/303,390.40
  6. Step 6: Final answer
    x = 122,661.60

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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.