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Finding the Fourth Proportional to 674,857.14, 931,258.53 and 388,330.98

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Solution

The fourth proportional to 674,857.14, 931,258.53 and 388,330.98 is: 535,871.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,857.14 : 931,258.53 = 388,330.98 : x
  2. Step 2: Convert to fraction form
    674,857.14/931,258.53 = 388,330.98/x
  3. Step 3: Cross multiply
    674,857.14x = 931,258.53 × 388,330.98
  4. Step 4: Simplify right side
    674,857.14x = 361,636,537,588.26
  5. Step 5: Solve for x
    x = 361,636,537,588.26/674,857.14
  6. Step 6: Final answer
    x = 535,871.25

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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.