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Finding the Fourth Proportional to 490,870.40, 736,737.60 and 290,940.80

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Solution

The fourth proportional to 490,870.40, 736,737.60 and 290,940.80 is: 436,667.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,870.40 : 736,737.60 = 290,940.80 : x
  2. Step 2: Convert to fraction form
    490,870.40/736,737.60 = 290,940.80/x
  3. Step 3: Cross multiply
    490,870.40x = 736,737.60 × 290,940.80
  4. Step 4: Simplify right side
    490,870.40x = 214,347,026,734.08
  5. Step 5: Solve for x
    x = 214,347,026,734.08/490,870.40
  6. Step 6: Final answer
    x = 436,667.25

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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.