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Finding the Fourth Proportional to 555,384.13, 766,428.78 and 300,735.32

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Solution

The fourth proportional to 555,384.13, 766,428.78 and 300,735.32 is: 415,014.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,384.13 : 766,428.78 = 300,735.32 : x
  2. Step 2: Convert to fraction form
    555,384.13/766,428.78 = 300,735.32/x
  3. Step 3: Cross multiply
    555,384.13x = 766,428.78 × 300,735.32
  4. Step 4: Simplify right side
    555,384.13x = 230,492,201,706.12
  5. Step 5: Solve for x
    x = 230,492,201,706.12/555,384.13
  6. Step 6: Final answer
    x = 415,014.02

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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.