Home / 645,911.40-968,429.70-330,108.60

Finding the Fourth Proportional to 645,911.40, 968,429.70 and 330,108.60

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Solution

The fourth proportional to 645,911.40, 968,429.70 and 330,108.60 is: 494,939.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,911.40 : 968,429.70 = 330,108.60 : x
  2. Step 2: Convert to fraction form
    645,911.40/968,429.70 = 330,108.60/x
  3. Step 3: Cross multiply
    645,911.40x = 968,429.70 × 330,108.60
  4. Step 4: Simplify right side
    645,911.40x = 319,686,972,465.42
  5. Step 5: Solve for x
    x = 319,686,972,465.42/645,911.40
  6. Step 6: Final answer
    x = 494,939.36

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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.