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Finding the Fourth Proportional to 691,973.32, 954,703.38 and 405,401.80

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Solution

The fourth proportional to 691,973.32, 954,703.38 and 405,401.80 is: 559,325.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,973.32 : 954,703.38 = 405,401.80 : x
  2. Step 2: Convert to fraction form
    691,973.32/954,703.38 = 405,401.80/x
  3. Step 3: Cross multiply
    691,973.32x = 954,703.38 × 405,401.80
  4. Step 4: Simplify right side
    691,973.32x = 387,038,468,718.08
  5. Step 5: Solve for x
    x = 387,038,468,718.08/691,973.32
  6. Step 6: Final answer
    x = 559,325.71

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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.