Home / 305,869.31-458,901.47-128,328.65

Finding the Fourth Proportional to 305,869.31, 458,901.47 and 128,328.65

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Solution

The fourth proportional to 305,869.31, 458,901.47 and 128,328.65 is: 192,533.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,869.31 : 458,901.47 = 128,328.65 : x
  2. Step 2: Convert to fraction form
    305,869.31/458,901.47 = 128,328.65/x
  3. Step 3: Cross multiply
    305,869.31x = 458,901.47 × 128,328.65
  4. Step 4: Simplify right side
    305,869.31x = 58,890,206,128.12
  5. Step 5: Solve for x
    x = 58,890,206,128.12/305,869.31
  6. Step 6: Final answer
    x = 192,533.88

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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.