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Finding the Fourth Proportional to 355,590, 490,294.92 and 287,396.10

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Solution

The fourth proportional to 355,590, 490,294.92 and 287,396.10 is: 396,267.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,590 : 490,294.92 = 287,396.10 : x
  2. Step 2: Convert to fraction form
    355,590/490,294.92 = 287,396.10/x
  3. Step 3: Cross multiply
    355,590x = 490,294.92 × 287,396.10
  4. Step 4: Simplify right side
    355,590x = 140,908,847,857.81
  5. Step 5: Solve for x
    x = 140,908,847,857.81/355,590
  6. Step 6: Final answer
    x = 396,267.75

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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.