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Finding the Fourth Proportional to 591,391.86, 816,120.27 and 319,459.67

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Solution

The fourth proportional to 591,391.86, 816,120.27 and 319,459.67 is: 440,854.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,391.86 : 816,120.27 = 319,459.67 : x
  2. Step 2: Convert to fraction form
    591,391.86/816,120.27 = 319,459.67/x
  3. Step 3: Cross multiply
    591,391.86x = 816,120.27 × 319,459.67
  4. Step 4: Simplify right side
    591,391.86x = 260,717,512,134.51
  5. Step 5: Solve for x
    x = 260,717,512,134.51/591,391.86
  6. Step 6: Final answer
    x = 440,854.08

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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.