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Finding the Fourth Proportional to 303,605.40, 455,408.10 and 213,063.60

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Solution

The fourth proportional to 303,605.40, 455,408.10 and 213,063.60 is: 319,595.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,605.40 : 455,408.10 = 213,063.60 : x
  2. Step 2: Convert to fraction form
    303,605.40/455,408.10 = 213,063.60/x
  3. Step 3: Cross multiply
    303,605.40x = 455,408.10 × 213,063.60
  4. Step 4: Simplify right side
    303,605.40x = 97,030,889,255.16
  5. Step 5: Solve for x
    x = 97,030,889,255.16/303,605.40
  6. Step 6: Final answer
    x = 319,595.40

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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.