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Finding the Fourth Proportional to 538,371.36, 742,909.32 and 312,031.44

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Solution

The fourth proportional to 538,371.36, 742,909.32 and 312,031.44 is: 430,578.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,371.36 : 742,909.32 = 312,031.44 : x
  2. Step 2: Convert to fraction form
    538,371.36/742,909.32 = 312,031.44/x
  3. Step 3: Cross multiply
    538,371.36x = 742,909.32 × 312,031.44
  4. Step 4: Simplify right side
    538,371.36x = 231,811,064,909.02
  5. Step 5: Solve for x
    x = 231,811,064,909.02/538,371.36
  6. Step 6: Final answer
    x = 430,578.37

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1.5x scale

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.