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Finding the Fourth Proportional to 290,748.36, 436,122.54 and 91,070.40

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Solution

The fourth proportional to 290,748.36, 436,122.54 and 91,070.40 is: 136,605.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,748.36 : 436,122.54 = 91,070.40 : x
  2. Step 2: Convert to fraction form
    290,748.36/436,122.54 = 91,070.40/x
  3. Step 3: Cross multiply
    290,748.36x = 436,122.54 × 91,070.40
  4. Step 4: Simplify right side
    290,748.36x = 39,717,854,166.82
  5. Step 5: Solve for x
    x = 39,717,854,166.82/290,748.36
  6. Step 6: Final answer
    x = 136,605.60

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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.