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Finding the Fourth Proportional to 455,455.90, 628,513.05 and 251,503.30

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Solution

The fourth proportional to 455,455.90, 628,513.05 and 251,503.30 is: 347,065.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,455.90 : 628,513.05 = 251,503.30 : x
  2. Step 2: Convert to fraction form
    455,455.90/628,513.05 = 251,503.30/x
  3. Step 3: Cross multiply
    455,455.90x = 628,513.05 × 251,503.30
  4. Step 4: Simplify right side
    455,455.90x = 158,073,106,168.07
  5. Step 5: Solve for x
    x = 158,073,106,168.07/455,455.90
  6. Step 6: Final answer
    x = 347,065.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.