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Finding the Fourth Proportional to 647,147.28, 892,800 and 429,458.40

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Solution

The fourth proportional to 647,147.28, 892,800 and 429,458.40 is: 592,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,147.28 : 892,800 = 429,458.40 : x
  2. Step 2: Convert to fraction form
    647,147.28/892,800 = 429,458.40/x
  3. Step 3: Cross multiply
    647,147.28x = 892,800 × 429,458.40
  4. Step 4: Simplify right side
    647,147.28x = 383,420,459,520
  5. Step 5: Solve for x
    x = 383,420,459,520/647,147.28
  6. Step 6: Final answer
    x = 592,477.90

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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.