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Finding the Fourth Proportional to 648,603.40, 972,386.70 and 274,318.60

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Solution

The fourth proportional to 648,603.40, 972,386.70 and 274,318.60 is: 411,258.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,603.40 : 972,386.70 = 274,318.60 : x
  2. Step 2: Convert to fraction form
    648,603.40/972,386.70 = 274,318.60/x
  3. Step 3: Cross multiply
    648,603.40x = 972,386.70 × 274,318.60
  4. Step 4: Simplify right side
    648,603.40x = 266,743,758,202.62
  5. Step 5: Solve for x
    x = 266,743,758,202.62/648,603.40
  6. Step 6: Final answer
    x = 411,258.65

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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.