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Finding the Fourth Proportional to 705,303.86, 973,379.63 and 399,434.36

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Solution

The fourth proportional to 705,303.86, 973,379.63 and 399,434.36 is: 551,253.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,303.86 : 973,379.63 = 399,434.36 : x
  2. Step 2: Convert to fraction form
    705,303.86/973,379.63 = 399,434.36/x
  3. Step 3: Cross multiply
    705,303.86x = 973,379.63 × 399,434.36
  4. Step 4: Simplify right side
    705,303.86x = 388,801,265,677.78
  5. Step 5: Solve for x
    x = 388,801,265,677.78/705,303.86
  6. Step 6: Final answer
    x = 551,253.57

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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.