Home / 645,203.75-890,431.04-387,090.41

Finding the Fourth Proportional to 645,203.75, 890,431.04 and 387,090.41

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Solution

The fourth proportional to 645,203.75, 890,431.04 and 387,090.41 is: 534,214.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,203.75 : 890,431.04 = 387,090.41 : x
  2. Step 2: Convert to fraction form
    645,203.75/890,431.04 = 387,090.41/x
  3. Step 3: Cross multiply
    645,203.75x = 890,431.04 × 387,090.41
  4. Step 4: Simplify right side
    645,203.75x = 344,677,312,865.90
  5. Step 5: Solve for x
    x = 344,677,312,865.90/645,203.75
  6. Step 6: Final answer
    x = 534,214.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.