Home / 642,428.14-886,513.80-355,931.14

Finding the Fourth Proportional to 642,428.14, 886,513.80 and 355,931.14

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Solution

The fourth proportional to 642,428.14, 886,513.80 and 355,931.14 is: 491,164.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,428.14 : 886,513.80 = 355,931.14 : x
  2. Step 2: Convert to fraction form
    642,428.14/886,513.80 = 355,931.14/x
  3. Step 3: Cross multiply
    642,428.14x = 886,513.80 × 355,931.14
  4. Step 4: Simplify right side
    642,428.14x = 315,537,867,459.73
  5. Step 5: Solve for x
    x = 315,537,867,459.73/642,428.14
  6. Step 6: Final answer
    x = 491,164.46

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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.