Home / 645,580.12-967,357.98-408,421.84

Finding the Fourth Proportional to 645,580.12, 967,357.98 and 408,421.84

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Solution

The fourth proportional to 645,580.12, 967,357.98 and 408,421.84 is: 611,992.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,580.12 : 967,357.98 = 408,421.84 : x
  2. Step 2: Convert to fraction form
    645,580.12/967,357.98 = 408,421.84/x
  3. Step 3: Cross multiply
    645,580.12x = 967,357.98 × 408,421.84
  4. Step 4: Simplify right side
    645,580.12x = 395,090,126,130.28
  5. Step 5: Solve for x
    x = 395,090,126,130.28/645,580.12
  6. Step 6: Final answer
    x = 611,992.40

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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.