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Finding the Fourth Proportional to 714,081.88, 985,442.70 and 391,786.12

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Solution

The fourth proportional to 714,081.88, 985,442.70 and 391,786.12 is: 540,670.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,081.88 : 985,442.70 = 391,786.12 : x
  2. Step 2: Convert to fraction form
    714,081.88/985,442.70 = 391,786.12/x
  3. Step 3: Cross multiply
    714,081.88x = 985,442.70 × 391,786.12
  4. Step 4: Simplify right side
    714,081.88x = 386,082,771,915.32
  5. Step 5: Solve for x
    x = 386,082,771,915.32/714,081.88
  6. Step 6: Final answer
    x = 540,670.17

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Double scale
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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.