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Finding the Fourth Proportional to 908,804.72, 1,363,483.94 and 429,400.65

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Solution

The fourth proportional to 908,804.72, 1,363,483.94 and 429,400.65 is: 644,231.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,804.72 : 1,363,483.94 = 429,400.65 : x
  2. Step 2: Convert to fraction form
    908,804.72/1,363,483.94 = 429,400.65/x
  3. Step 3: Cross multiply
    908,804.72x = 1,363,483.94 × 429,400.65
  4. Step 4: Simplify right side
    908,804.72x = 585,480,890,100.56
  5. Step 5: Solve for x
    x = 585,480,890,100.56/908,804.72
  6. Step 6: Final answer
    x = 644,231.79

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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.