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Finding the Fourth Proportional to 620,643.14, 856,486.23 and 348,718.04

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Solution

The fourth proportional to 620,643.14, 856,486.23 and 348,718.04 is: 481,230.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,643.14 : 856,486.23 = 348,718.04 : x
  2. Step 2: Convert to fraction form
    620,643.14/856,486.23 = 348,718.04/x
  3. Step 3: Cross multiply
    620,643.14x = 856,486.23 × 348,718.04
  4. Step 4: Simplify right side
    620,643.14x = 298,672,199,412.59
  5. Step 5: Solve for x
    x = 298,672,199,412.59/620,643.14
  6. Step 6: Final answer
    x = 481,230.16

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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.