Home / 305,485.65-458,228.07-172,305.45

Finding the Fourth Proportional to 305,485.65, 458,228.07 and 172,305.45

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Solution

The fourth proportional to 305,485.65, 458,228.07 and 172,305.45 is: 258,457.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,485.65 : 458,228.07 = 172,305.45 : x
  2. Step 2: Convert to fraction form
    305,485.65/458,228.07 = 172,305.45/x
  3. Step 3: Cross multiply
    305,485.65x = 458,228.07 × 172,305.45
  4. Step 4: Simplify right side
    305,485.65x = 78,955,193,803.98
  5. Step 5: Solve for x
    x = 78,955,193,803.98/305,485.65
  6. Step 6: Final answer
    x = 258,457.95

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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.