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Finding the Fourth Proportional to 417,999.70, 626,999.55 and 311,554.90

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Solution

The fourth proportional to 417,999.70, 626,999.55 and 311,554.90 is: 467,332.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,999.70 : 626,999.55 = 311,554.90 : x
  2. Step 2: Convert to fraction form
    417,999.70/626,999.55 = 311,554.90/x
  3. Step 3: Cross multiply
    417,999.70x = 626,999.55 × 311,554.90
  4. Step 4: Simplify right side
    417,999.70x = 195,344,782,100.30
  5. Step 5: Solve for x
    x = 195,344,782,100.30/417,999.70
  6. Step 6: Final answer
    x = 467,332.35

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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.