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Finding the Fourth Proportional to 399,776.93, 551,638.85 and 256,730.73

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Solution

The fourth proportional to 399,776.93, 551,638.85 and 256,730.73 is: 354,254.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,776.93 : 551,638.85 = 256,730.73 : x
  2. Step 2: Convert to fraction form
    399,776.93/551,638.85 = 256,730.73/x
  3. Step 3: Cross multiply
    399,776.93x = 551,638.85 × 256,730.73
  4. Step 4: Simplify right side
    399,776.93x = 141,622,643,373.21
  5. Step 5: Solve for x
    x = 141,622,643,373.21/399,776.93
  6. Step 6: Final answer
    x = 354,254.17

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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.