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Finding the Fourth Proportional to 305,726.85, 458,768.88 and 128,219.00

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Solution

The fourth proportional to 305,726.85, 458,768.88 and 128,219.00 is: 192,403.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,726.85 : 458,768.88 = 128,219.00 : x
  2. Step 2: Convert to fraction form
    305,726.85/458,768.88 = 128,219.00/x
  3. Step 3: Cross multiply
    305,726.85x = 458,768.88 × 128,219.00
  4. Step 4: Simplify right side
    305,726.85x = 58,822,884,730.88
  5. Step 5: Solve for x
    x = 58,822,884,730.88/305,726.85
  6. Step 6: Final answer
    x = 192,403.40

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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.