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Finding the Fourth Proportional to 538,367.40, 806,643.90 and 425,615.40

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Solution

The fourth proportional to 538,367.40, 806,643.90 and 425,615.40 is: 637,705.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,367.40 : 806,643.90 = 425,615.40 : x
  2. Step 2: Convert to fraction form
    538,367.40/806,643.90 = 425,615.40/x
  3. Step 3: Cross multiply
    538,367.40x = 806,643.90 × 425,615.40
  4. Step 4: Simplify right side
    538,367.40x = 343,320,066,156.06
  5. Step 5: Solve for x
    x = 343,320,066,156.06/538,367.40
  6. Step 6: Final answer
    x = 637,705.90

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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.