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Finding the Fourth Proportional to 705,317.13, 973,348.92 and 399,385.26

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Solution

The fourth proportional to 705,317.13, 973,348.92 and 399,385.26 is: 551,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,317.13 : 973,348.92 = 399,385.26 : x
  2. Step 2: Convert to fraction form
    705,317.13/973,348.92 = 399,385.26/x
  3. Step 3: Cross multiply
    705,317.13x = 973,348.92 × 399,385.26
  4. Step 4: Simplify right side
    705,317.13x = 388,741,211,484.92
  5. Step 5: Solve for x
    x = 388,741,211,484.92/705,317.13
  6. Step 6: Final answer
    x = 551,158.05

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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.