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Finding the Fourth Proportional to 309,263.88, 427,643.10 and 245,490.96

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Solution

The fourth proportional to 309,263.88, 427,643.10 and 245,490.96 is: 339,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,263.88 : 427,643.10 = 245,490.96 : x
  2. Step 2: Convert to fraction form
    309,263.88/427,643.10 = 245,490.96/x
  3. Step 3: Cross multiply
    309,263.88x = 427,643.10 × 245,490.96
  4. Step 4: Simplify right side
    309,263.88x = 104,982,515,156.38
  5. Step 5: Solve for x
    x = 104,982,515,156.38/309,263.88
  6. Step 6: Final answer
    x = 339,459.35

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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.