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Finding the Fourth Proportional to 911,299.96, 1,257,605.63 and 503,400.16

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Solution

The fourth proportional to 911,299.96, 1,257,605.63 and 503,400.16 is: 694,698.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,299.96 : 1,257,605.63 = 503,400.16 : x
  2. Step 2: Convert to fraction form
    911,299.96/1,257,605.63 = 503,400.16/x
  3. Step 3: Cross multiply
    911,299.96x = 1,257,605.63 × 503,400.16
  4. Step 4: Simplify right side
    911,299.96x = 633,078,872,841.90
  5. Step 5: Solve for x
    x = 633,078,872,841.90/911,299.96
  6. Step 6: Final answer
    x = 694,698.67

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1.5x scale

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.