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Finding the Fourth Proportional to 438,561.52, 657,925.22 and 139,117.48

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Solution

The fourth proportional to 438,561.52, 657,925.22 and 139,117.48 is: 208,702.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,561.52 : 657,925.22 = 139,117.48 : x
  2. Step 2: Convert to fraction form
    438,561.52/657,925.22 = 139,117.48/x
  3. Step 3: Cross multiply
    438,561.52x = 657,925.22 × 139,117.48
  4. Step 4: Simplify right side
    438,561.52x = 91,528,898,634.85
  5. Step 5: Solve for x
    x = 91,528,898,634.85/438,561.52
  6. Step 6: Final answer
    x = 208,702.53

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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.