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Finding the Fourth Proportional to 645,858.40, 968,350.20 and 330,055.60

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Solution

The fourth proportional to 645,858.40, 968,350.20 and 330,055.60 is: 494,859.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,858.40 : 968,350.20 = 330,055.60 : x
  2. Step 2: Convert to fraction form
    645,858.40/968,350.20 = 330,055.60/x
  3. Step 3: Cross multiply
    645,858.40x = 968,350.20 × 330,055.60
  4. Step 4: Simplify right side
    645,858.40x = 319,609,406,271.12
  5. Step 5: Solve for x
    x = 319,609,406,271.12/645,858.40
  6. Step 6: Final answer
    x = 494,859.87

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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.