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Finding the Fourth Proportional to 296,999.70, 445,499.55 and 290,438.70

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Solution

The fourth proportional to 296,999.70, 445,499.55 and 290,438.70 is: 435,658.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,999.70 : 445,499.55 = 290,438.70 : x
  2. Step 2: Convert to fraction form
    296,999.70/445,499.55 = 290,438.70/x
  3. Step 3: Cross multiply
    296,999.70x = 445,499.55 × 290,438.70
  4. Step 4: Simplify right side
    296,999.70x = 129,390,310,152.59
  5. Step 5: Solve for x
    x = 129,390,310,152.59/296,999.70
  6. Step 6: Final answer
    x = 435,658.05

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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.