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Finding the Fourth Proportional to 451,751.40, 678,404.70 and 319,559.40

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Solution

The fourth proportional to 451,751.40, 678,404.70 and 319,559.40 is: 479,889.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,751.40 : 678,404.70 = 319,559.40 : x
  2. Step 2: Convert to fraction form
    451,751.40/678,404.70 = 319,559.40/x
  3. Step 3: Cross multiply
    451,751.40x = 678,404.70 × 319,559.40
  4. Step 4: Simplify right side
    451,751.40x = 216,790,598,889.18
  5. Step 5: Solve for x
    x = 216,790,598,889.18/451,751.40
  6. Step 6: Final answer
    x = 479,889.16

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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.