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Finding the Fourth Proportional to 659,129.65, 909,590.74 and 387,222.34

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Solution

The fourth proportional to 659,129.65, 909,590.74 and 387,222.34 is: 534,362.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,129.65 : 909,590.74 = 387,222.34 : x
  2. Step 2: Convert to fraction form
    659,129.65/909,590.74 = 387,222.34/x
  3. Step 3: Cross multiply
    659,129.65x = 909,590.74 × 387,222.34
  4. Step 4: Simplify right side
    659,129.65x = 352,213,854,785.13
  5. Step 5: Solve for x
    x = 352,213,854,785.13/659,129.65
  6. Step 6: Final answer
    x = 534,362.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.