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Finding the Fourth Proportional to 290,752.16, 436,136.48 and 80,390.08

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Solution

The fourth proportional to 290,752.16, 436,136.48 and 80,390.08 is: 120,587.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,752.16 : 436,136.48 = 80,390.08 : x
  2. Step 2: Convert to fraction form
    290,752.16/436,136.48 = 80,390.08/x
  3. Step 3: Cross multiply
    290,752.16x = 436,136.48 × 80,390.08
  4. Step 4: Simplify right side
    290,752.16x = 35,061,046,518.12
  5. Step 5: Solve for x
    x = 35,061,046,518.12/290,752.16
  6. Step 6: Final answer
    x = 120,587.40

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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.