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Finding the Fourth Proportional to 558,390.88, 837,679.74 and 438,443

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Solution

The fourth proportional to 558,390.88, 837,679.74 and 438,443 is: 657,737.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,390.88 : 837,679.74 = 438,443 : x
  2. Step 2: Convert to fraction form
    558,390.88/837,679.74 = 438,443/x
  3. Step 3: Cross multiply
    558,390.88x = 837,679.74 × 438,443
  4. Step 4: Simplify right side
    558,390.88x = 367,274,818,244.82
  5. Step 5: Solve for x
    x = 367,274,818,244.82/558,390.88
  6. Step 6: Final answer
    x = 657,737.85

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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.