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Finding the Fourth Proportional to 425,367.70, 638,052.51 and 399,386.26

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Solution

The fourth proportional to 425,367.70, 638,052.51 and 399,386.26 is: 599,080.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,367.70 : 638,052.51 = 399,386.26 : x
  2. Step 2: Convert to fraction form
    425,367.70/638,052.51 = 399,386.26/x
  3. Step 3: Cross multiply
    425,367.70x = 638,052.51 × 399,386.26
  4. Step 4: Simplify right side
    425,367.70x = 254,829,405,652.51
  5. Step 5: Solve for x
    x = 254,829,405,652.51/425,367.70
  6. Step 6: Final answer
    x = 599,080.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.