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Finding the Fourth Proportional to 416,624.40, 624,936.60 and 390,380.40

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Solution

The fourth proportional to 416,624.40, 624,936.60 and 390,380.40 is: 585,570.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    416,624.40 : 624,936.60 = 390,380.40 : x
  2. Step 2: Convert to fraction form
    416,624.40/624,936.60 = 390,380.40/x
  3. Step 3: Cross multiply
    416,624.40x = 624,936.60 × 390,380.40
  4. Step 4: Simplify right side
    416,624.40x = 243,962,999,882.64
  5. Step 5: Solve for x
    x = 243,962,999,882.64/416,624.40
  6. Step 6: Final answer
    x = 585,570.60

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1.5x scale

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.