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Finding the Fourth Proportional to 652,260.40, 978,390.60 and 605,021.20

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Solution

The fourth proportional to 652,260.40, 978,390.60 and 605,021.20 is: 907,531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,260.40 : 978,390.60 = 605,021.20 : x
  2. Step 2: Convert to fraction form
    652,260.40/978,390.60 = 605,021.20/x
  3. Step 3: Cross multiply
    652,260.40x = 978,390.60 × 605,021.20
  4. Step 4: Simplify right side
    652,260.40x = 591,947,054,880.72
  5. Step 5: Solve for x
    x = 591,947,054,880.72/652,260.40
  6. Step 6: Final answer
    x = 907,531.80

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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.