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Finding the Fourth Proportional to 637,729.60, 956,709.60 and 321,390.40

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Solution

The fourth proportional to 637,729.60, 956,709.60 and 321,390.40 is: 482,143.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,729.60 : 956,709.60 = 321,390.40 : x
  2. Step 2: Convert to fraction form
    637,729.60/956,709.60 = 321,390.40/x
  3. Step 3: Cross multiply
    637,729.60x = 956,709.60 × 321,390.40
  4. Step 4: Simplify right side
    637,729.60x = 307,477,281,027.84
  5. Step 5: Solve for x
    x = 307,477,281,027.84/637,729.60
  6. Step 6: Final answer
    x = 482,143.66

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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.