Home / 687,813.80-1,031,720.70-617,829.80

Finding the Fourth Proportional to 687,813.80, 1,031,720.70 and 617,829.80

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Solution

The fourth proportional to 687,813.80, 1,031,720.70 and 617,829.80 is: 926,744.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,813.80 : 1,031,720.70 = 617,829.80 : x
  2. Step 2: Convert to fraction form
    687,813.80/1,031,720.70 = 617,829.80/x
  3. Step 3: Cross multiply
    687,813.80x = 1,031,720.70 × 617,829.80
  4. Step 4: Simplify right side
    687,813.80x = 637,427,793,736.86
  5. Step 5: Solve for x
    x = 637,427,793,736.86/687,813.80
  6. Step 6: Final answer
    x = 926,744.70

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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.