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Finding the Fourth Proportional to 455,499.60, 683,443.80 and 218,720.40

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Solution

The fourth proportional to 455,499.60, 683,443.80 and 218,720.40 is: 328,173.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,499.60 : 683,443.80 = 218,720.40 : x
  2. Step 2: Convert to fraction form
    455,499.60/683,443.80 = 218,720.40/x
  3. Step 3: Cross multiply
    455,499.60x = 683,443.80 × 218,720.40
  4. Step 4: Simplify right side
    455,499.60x = 149,483,101,313.52
  5. Step 5: Solve for x
    x = 149,483,101,313.52/455,499.60
  6. Step 6: Final answer
    x = 328,173.95

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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.