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Finding the Fourth Proportional to 303,485.70, 455,746.95 and 198,768.90

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Solution

The fourth proportional to 303,485.70, 455,746.95 and 198,768.90 is: 298,492.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,485.70 : 455,746.95 = 198,768.90 : x
  2. Step 2: Convert to fraction form
    303,485.70/455,746.95 = 198,768.90/x
  3. Step 3: Cross multiply
    303,485.70x = 455,746.95 × 198,768.90
  4. Step 4: Simplify right side
    303,485.70x = 90,588,319,929.86
  5. Step 5: Solve for x
    x = 90,588,319,929.86/303,485.70
  6. Step 6: Final answer
    x = 298,492.88

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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.