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Finding the Fourth Proportional to 290,678.92, 436,026.58 and 80,316.88

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Solution

The fourth proportional to 290,678.92, 436,026.58 and 80,316.88 is: 120,477.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,678.92 : 436,026.58 = 80,316.88 : x
  2. Step 2: Convert to fraction form
    290,678.92/436,026.58 = 80,316.88/x
  3. Step 3: Cross multiply
    290,678.92x = 436,026.58 × 80,316.88
  4. Step 4: Simplify right side
    290,678.92x = 35,020,294,502.67
  5. Step 5: Solve for x
    x = 35,020,294,502.67/290,678.92
  6. Step 6: Final answer
    x = 120,477.59

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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.