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Finding the Fourth Proportional to 438,613.88, 657,944.31 and 139,117.19

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Solution

The fourth proportional to 438,613.88, 657,944.31 and 139,117.19 is: 208,683.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,613.88 : 657,944.31 = 139,117.19 : x
  2. Step 2: Convert to fraction form
    438,613.88/657,944.31 = 139,117.19/x
  3. Step 3: Cross multiply
    438,613.88x = 657,944.31 × 139,117.19
  4. Step 4: Simplify right side
    438,613.88x = 91,531,363,583.69
  5. Step 5: Solve for x
    x = 91,531,363,583.69/438,613.88
  6. Step 6: Final answer
    x = 208,683.24

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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.