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Finding the Fourth Proportional to 626,386.77, 864,401.63 and 354,449.66

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Solution

The fourth proportional to 626,386.77, 864,401.63 and 354,449.66 is: 489,133.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,386.77 : 864,401.63 = 354,449.66 : x
  2. Step 2: Convert to fraction form
    626,386.77/864,401.63 = 354,449.66/x
  3. Step 3: Cross multiply
    626,386.77x = 864,401.63 × 354,449.66
  4. Step 4: Simplify right side
    626,386.77x = 306,386,857,762.69
  5. Step 5: Solve for x
    x = 306,386,857,762.69/626,386.77
  6. Step 6: Final answer
    x = 489,133.67

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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.