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Finding the Fourth Proportional to 290,000.90, 434,984.04 and 90,293.18

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Solution

The fourth proportional to 290,000.90, 434,984.04 and 90,293.18 is: 135,434.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,000.90 : 434,984.04 = 90,293.18 : x
  2. Step 2: Convert to fraction form
    290,000.90/434,984.04 = 90,293.18/x
  3. Step 3: Cross multiply
    290,000.90x = 434,984.04 × 90,293.18
  4. Step 4: Simplify right side
    290,000.90x = 39,276,092,220.85
  5. Step 5: Solve for x
    x = 39,276,092,220.85/290,000.90
  6. Step 6: Final answer
    x = 135,434.38

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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.