Home / 815,045.40-1,221,401.70-565,435.80

Finding the Fourth Proportional to 815,045.40, 1,221,401.70 and 565,435.80

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Solution

The fourth proportional to 815,045.40, 1,221,401.70 and 565,435.80 is: 847,344.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,045.40 : 1,221,401.70 = 565,435.80 : x
  2. Step 2: Convert to fraction form
    815,045.40/1,221,401.70 = 565,435.80/x
  3. Step 3: Cross multiply
    815,045.40x = 1,221,401.70 × 565,435.80
  4. Step 4: Simplify right side
    815,045.40x = 690,624,247,360.86
  5. Step 5: Solve for x
    x = 690,624,247,360.86/815,045.40
  6. Step 6: Final answer
    x = 847,344.51

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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.