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Finding the Fourth Proportional to 424,459.21, 635,941.42 and 399,174.23

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Solution

The fourth proportional to 424,459.21, 635,941.42 and 399,174.23 is: 598,058.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,459.21 : 635,941.42 = 399,174.23 : x
  2. Step 2: Convert to fraction form
    424,459.21/635,941.42 = 399,174.23/x
  3. Step 3: Cross multiply
    424,459.21x = 635,941.42 × 399,174.23
  4. Step 4: Simplify right side
    424,459.21x = 253,851,426,653.61
  5. Step 5: Solve for x
    x = 253,851,426,653.61/424,459.21
  6. Step 6: Final answer
    x = 598,058.47

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1.5x scale

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.