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Finding the Fourth Proportional to 419,989.40, 630,640.20 and 242,842.40

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Solution

The fourth proportional to 419,989.40, 630,640.20 and 242,842.40 is: 364,642.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,989.40 : 630,640.20 = 242,842.40 : x
  2. Step 2: Convert to fraction form
    419,989.40/630,640.20 = 242,842.40/x
  3. Step 3: Cross multiply
    419,989.40x = 630,640.20 × 242,842.40
  4. Step 4: Simplify right side
    419,989.40x = 153,146,179,704.48
  5. Step 5: Solve for x
    x = 153,146,179,704.48/419,989.40
  6. Step 6: Final answer
    x = 364,642.96

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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.