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Finding the Fourth Proportional to 768,306.80, 1,060,289.88 and 428,838.32

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Solution

The fourth proportional to 768,306.80, 1,060,289.88 and 428,838.32 is: 591,811.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,306.80 : 1,060,289.88 = 428,838.32 : x
  2. Step 2: Convert to fraction form
    768,306.80/1,060,289.88 = 428,838.32/x
  3. Step 3: Cross multiply
    768,306.80x = 1,060,289.88 × 428,838.32
  4. Step 4: Simplify right side
    768,306.80x = 454,692,930,852.20
  5. Step 5: Solve for x
    x = 454,692,930,852.20/768,306.80
  6. Step 6: Final answer
    x = 591,811.67

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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.