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Finding the Fourth Proportional to 911,699.55, 1,258,221.11 and 503,880.98

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Solution

The fourth proportional to 911,699.55, 1,258,221.11 and 503,880.98 is: 695,397.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,699.55 : 1,258,221.11 = 503,880.98 : x
  2. Step 2: Convert to fraction form
    911,699.55/1,258,221.11 = 503,880.98/x
  3. Step 3: Cross multiply
    911,699.55x = 1,258,221.11 × 503,880.98
  4. Step 4: Simplify right side
    911,699.55x = 633,993,677,152.98
  5. Step 5: Solve for x
    x = 633,993,677,152.98/911,699.55
  6. Step 6: Final answer
    x = 695,397.60

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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.