Home / 819,988.90-1,230,338.55-440,466.79

Finding the Fourth Proportional to 819,988.90, 1,230,338.55 and 440,466.79

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Solution

The fourth proportional to 819,988.90, 1,230,338.55 and 440,466.79 is: 660,890.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,988.90 : 1,230,338.55 = 440,466.79 : x
  2. Step 2: Convert to fraction form
    819,988.90/1,230,338.55 = 440,466.79/x
  3. Step 3: Cross multiply
    819,988.90x = 1,230,338.55 × 440,466.79
  4. Step 4: Simplify right side
    819,988.90x = 541,923,271,731.76
  5. Step 5: Solve for x
    x = 541,923,271,731.76/819,988.90
  6. Step 6: Final answer
    x = 660,890.98

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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.