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Finding the Fourth Proportional to 691,716.80, 954,549.76 and 385,802.40

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Solution

The fourth proportional to 691,716.80, 954,549.76 and 385,802.40 is: 532,396.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,716.80 : 954,549.76 = 385,802.40 : x
  2. Step 2: Convert to fraction form
    691,716.80/954,549.76 = 385,802.40/x
  3. Step 3: Cross multiply
    691,716.80x = 954,549.76 × 385,802.40
  4. Step 4: Simplify right side
    691,716.80x = 368,267,588,327.42
  5. Step 5: Solve for x
    x = 368,267,588,327.42/691,716.80
  6. Step 6: Final answer
    x = 532,396.48

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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.