Home / 640,869.20-961,368.96-220,090.40

Finding the Fourth Proportional to 640,869.20, 961,368.96 and 220,090.40

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Solution

The fourth proportional to 640,869.20, 961,368.96 and 220,090.40 is: 330,157.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,869.20 : 961,368.96 = 220,090.40 : x
  2. Step 2: Convert to fraction form
    640,869.20/961,368.96 = 220,090.40/x
  3. Step 3: Cross multiply
    640,869.20x = 961,368.96 × 220,090.40
  4. Step 4: Simplify right side
    640,869.20x = 211,588,078,953.98
  5. Step 5: Solve for x
    x = 211,588,078,953.98/640,869.20
  6. Step 6: Final answer
    x = 330,157.98

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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.