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Finding the Fourth Proportional to 305,667.84, 458,354.29 and 128,127.18

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Solution

The fourth proportional to 305,667.84, 458,354.29 and 128,127.18 is: 192,128.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,667.84 : 458,354.29 = 128,127.18 : x
  2. Step 2: Convert to fraction form
    305,667.84/458,354.29 = 128,127.18/x
  3. Step 3: Cross multiply
    305,667.84x = 458,354.29 × 128,127.18
  4. Step 4: Simplify right side
    305,667.84x = 58,727,642,618.60
  5. Step 5: Solve for x
    x = 58,727,642,618.60/305,667.84
  6. Step 6: Final answer
    x = 192,128.95

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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.