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Finding the Fourth Proportional to 303,543.90, 455,315.40 and 90,310.86

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Solution

The fourth proportional to 303,543.90, 455,315.40 and 90,310.86 is: 135,466.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,543.90 : 455,315.40 = 90,310.86 : x
  2. Step 2: Convert to fraction form
    303,543.90/455,315.40 = 90,310.86/x
  3. Step 3: Cross multiply
    303,543.90x = 455,315.40 × 90,310.86
  4. Step 4: Simplify right side
    303,543.90x = 41,119,925,345.24
  5. Step 5: Solve for x
    x = 41,119,925,345.24/303,543.90
  6. Step 6: Final answer
    x = 135,466.16

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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.