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Finding the Fourth Proportional to 621,661.60, 933,183.60 and 385,271.20

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Solution

The fourth proportional to 621,661.60, 933,183.60 and 385,271.20 is: 578,335.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,661.60 : 933,183.60 = 385,271.20 : x
  2. Step 2: Convert to fraction form
    621,661.60/933,183.60 = 385,271.20/x
  3. Step 3: Cross multiply
    621,661.60x = 933,183.60 × 385,271.20
  4. Step 4: Simplify right side
    621,661.60x = 359,528,765,392.32
  5. Step 5: Solve for x
    x = 359,528,765,392.32/621,661.60
  6. Step 6: Final answer
    x = 578,335.17

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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.