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Finding the Fourth Proportional to 620,570.64, 856,392.84 and 348,643.92

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Solution

The fourth proportional to 620,570.64, 856,392.84 and 348,643.92 is: 481,131.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,570.64 : 856,392.84 = 348,643.92 : x
  2. Step 2: Convert to fraction form
    620,570.64/856,392.84 = 348,643.92/x
  3. Step 3: Cross multiply
    620,570.64x = 856,392.84 × 348,643.92
  4. Step 4: Simplify right side
    620,570.64x = 298,576,156,797.53
  5. Step 5: Solve for x
    x = 298,576,156,797.53/620,570.64
  6. Step 6: Final answer
    x = 481,131.62

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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.