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Finding the Fourth Proportional to 591,390.86, 816,118.89 and 319,458.67

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Solution

The fourth proportional to 591,390.86, 816,118.89 and 319,458.67 is: 440,852.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,390.86 : 816,118.89 = 319,458.67 : x
  2. Step 2: Convert to fraction form
    591,390.86/816,118.89 = 319,458.67/x
  3. Step 3: Cross multiply
    591,390.86x = 816,118.89 × 319,458.67
  4. Step 4: Simplify right side
    591,390.86x = 260,716,255,161.28
  5. Step 5: Solve for x
    x = 260,716,255,161.28/591,390.86
  6. Step 6: Final answer
    x = 440,852.70

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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.