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Finding the Fourth Proportional to 310,340.70, 465,511.05 and 99,999.90

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Solution

The fourth proportional to 310,340.70, 465,511.05 and 99,999.90 is: 149,999.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,340.70 : 465,511.05 = 99,999.90 : x
  2. Step 2: Convert to fraction form
    310,340.70/465,511.05 = 99,999.90/x
  3. Step 3: Cross multiply
    310,340.70x = 465,511.05 × 99,999.90
  4. Step 4: Simplify right side
    310,340.70x = 46,551,058,448.90
  5. Step 5: Solve for x
    x = 46,551,058,448.90/310,340.70
  6. Step 6: Final answer
    x = 149,999.85

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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.