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Finding the Fourth Proportional to 591,390.69, 816,118.51 and 319,458.53

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Solution

The fourth proportional to 591,390.69, 816,118.51 and 319,458.53 is: 440,852.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,390.69 : 816,118.51 = 319,458.53 : x
  2. Step 2: Convert to fraction form
    591,390.69/816,118.51 = 319,458.53/x
  3. Step 3: Cross multiply
    591,390.69x = 816,118.51 × 319,458.53
  4. Step 4: Simplify right side
    591,390.69x = 260,716,013,832.51
  5. Step 5: Solve for x
    x = 260,716,013,832.51/591,390.69
  6. Step 6: Final answer
    x = 440,852.41

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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.