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Finding the Fourth Proportional to 645,904.40, 968,419.20 and 330,101.60

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Solution

The fourth proportional to 645,904.40, 968,419.20 and 330,101.60 is: 494,928.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,904.40 : 968,419.20 = 330,101.60 : x
  2. Step 2: Convert to fraction form
    645,904.40/968,419.20 = 330,101.60/x
  3. Step 3: Cross multiply
    645,904.40x = 968,419.20 × 330,101.60
  4. Step 4: Simplify right side
    645,904.40x = 319,676,727,390.72
  5. Step 5: Solve for x
    x = 319,676,727,390.72/645,904.40
  6. Step 6: Final answer
    x = 494,928.86

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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.