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Finding the Fourth Proportional to 455,424.60, 683,331.30 and 218,645.40

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Solution

The fourth proportional to 455,424.60, 683,331.30 and 218,645.40 is: 328,061.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,424.60 : 683,331.30 = 218,645.40 : x
  2. Step 2: Convert to fraction form
    455,424.60/683,331.30 = 218,645.40/x
  3. Step 3: Cross multiply
    455,424.60x = 683,331.30 × 218,645.40
  4. Step 4: Simplify right side
    455,424.60x = 149,407,245,421.02
  5. Step 5: Solve for x
    x = 149,407,245,421.02/455,424.60
  6. Step 6: Final answer
    x = 328,061.43

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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.