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Finding the Fourth Proportional to 305,420.20, 458,130.30 and 136,940.20

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Solution

The fourth proportional to 305,420.20, 458,130.30 and 136,940.20 is: 205,410.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,420.20 : 458,130.30 = 136,940.20 : x
  2. Step 2: Convert to fraction form
    305,420.20/458,130.30 = 136,940.20/x
  3. Step 3: Cross multiply
    305,420.20x = 458,130.30 × 136,940.20
  4. Step 4: Simplify right side
    305,420.20x = 62,736,454,908.06
  5. Step 5: Solve for x
    x = 62,736,454,908.06/305,420.20
  6. Step 6: Final answer
    x = 205,410.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.