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Finding the Fourth Proportional to 303,498.90, 455,309.10 and 90,266.40

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Solution

The fourth proportional to 303,498.90, 455,309.10 and 90,266.40 is: 135,417.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,498.90 : 455,309.10 = 90,266.40 : x
  2. Step 2: Convert to fraction form
    303,498.90/455,309.10 = 90,266.40/x
  3. Step 3: Cross multiply
    303,498.90x = 455,309.10 × 90,266.40
  4. Step 4: Simplify right side
    303,498.90x = 41,099,113,344.24
  5. Step 5: Solve for x
    x = 41,099,113,344.24/303,498.90
  6. Step 6: Final answer
    x = 135,417.67

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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.