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Finding the Fourth Proportional to 978,577.20, 1,467,792.90 and 409,811.40

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Solution

The fourth proportional to 978,577.20, 1,467,792.90 and 409,811.40 is: 614,686.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,577.20 : 1,467,792.90 = 409,811.40 : x
  2. Step 2: Convert to fraction form
    978,577.20/1,467,792.90 = 409,811.40/x
  3. Step 3: Cross multiply
    978,577.20x = 1,467,792.90 × 409,811.40
  4. Step 4: Simplify right side
    978,577.20x = 601,518,263,259.06
  5. Step 5: Solve for x
    x = 601,518,263,259.06/978,577.20
  6. Step 6: Final answer
    x = 614,686.57

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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.