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Finding the Fourth Proportional to 571,999.35, 789,728.88 and 354,438.89

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Solution

The fourth proportional to 571,999.35, 789,728.88 and 354,438.89 is: 489,354.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,999.35 : 789,728.88 = 354,438.89 : x
  2. Step 2: Convert to fraction form
    571,999.35/789,728.88 = 354,438.89/x
  3. Step 3: Cross multiply
    571,999.35x = 789,728.88 × 354,438.89
  4. Step 4: Simplify right side
    571,999.35x = 279,910,625,477.98
  5. Step 5: Solve for x
    x = 279,910,625,477.98/571,999.35
  6. Step 6: Final answer
    x = 489,354.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.