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Finding the Fourth Proportional to 291,998.70, 437,998.05 and 290,030.40

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Solution

The fourth proportional to 291,998.70, 437,998.05 and 290,030.40 is: 435,045.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,998.70 : 437,998.05 = 290,030.40 : x
  2. Step 2: Convert to fraction form
    291,998.70/437,998.05 = 290,030.40/x
  3. Step 3: Cross multiply
    291,998.70x = 437,998.05 × 290,030.40
  4. Step 4: Simplify right side
    291,998.70x = 127,032,749,640.72
  5. Step 5: Solve for x
    x = 127,032,749,640.72/291,998.70
  6. Step 6: Final answer
    x = 435,045.60

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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.