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Finding the Fourth Proportional to 620,653.61, 856,448.97 and 348,700.16

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Solution

The fourth proportional to 620,653.61, 856,448.97 and 348,700.16 is: 481,176.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,653.61 : 856,448.97 = 348,700.16 : x
  2. Step 2: Convert to fraction form
    620,653.61/856,448.97 = 348,700.16/x
  3. Step 3: Cross multiply
    620,653.61x = 856,448.97 × 348,700.16
  4. Step 4: Simplify right side
    620,653.61x = 298,643,892,870.84
  5. Step 5: Solve for x
    x = 298,643,892,870.84/620,653.61
  6. Step 6: Final answer
    x = 481,176.44

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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.