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Finding the Fourth Proportional to 290,590.54, 435,762.79 and 90,857.30

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Solution

The fourth proportional to 290,590.54, 435,762.79 and 90,857.30 is: 136,247.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,590.54 : 435,762.79 = 90,857.30 : x
  2. Step 2: Convert to fraction form
    290,590.54/435,762.79 = 90,857.30/x
  3. Step 3: Cross multiply
    290,590.54x = 435,762.79 × 90,857.30
  4. Step 4: Simplify right side
    290,590.54x = 39,592,228,133.91
  5. Step 5: Solve for x
    x = 39,592,228,133.91/290,590.54
  6. Step 6: Final answer
    x = 136,247.48

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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.