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Finding the Fourth Proportional to 652,287.20, 978,430.80 and 403,455.20

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Solution

The fourth proportional to 652,287.20, 978,430.80 and 403,455.20 is: 605,182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,287.20 : 978,430.80 = 403,455.20 : x
  2. Step 2: Convert to fraction form
    652,287.20/978,430.80 = 403,455.20/x
  3. Step 3: Cross multiply
    652,287.20x = 978,430.80 × 403,455.20
  4. Step 4: Simplify right side
    652,287.20x = 394,752,994,100.16
  5. Step 5: Solve for x
    x = 394,752,994,100.16/652,287.20
  6. Step 6: Final answer
    x = 605,182.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.