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Finding the Fourth Proportional to 298,425.40, 447,638.10 and 251,186.20

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Solution

The fourth proportional to 298,425.40, 447,638.10 and 251,186.20 is: 376,779.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,425.40 : 447,638.10 = 251,186.20 : x
  2. Step 2: Convert to fraction form
    298,425.40/447,638.10 = 251,186.20/x
  3. Step 3: Cross multiply
    298,425.40x = 447,638.10 × 251,186.20
  4. Step 4: Simplify right side
    298,425.40x = 112,440,513,314.22
  5. Step 5: Solve for x
    x = 112,440,513,314.22/298,425.40
  6. Step 6: Final answer
    x = 376,779.30

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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.