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Finding the Fourth Proportional to 647,339.64, 892,911.72 and 429,543.60

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Solution

The fourth proportional to 647,339.64, 892,911.72 and 429,543.60 is: 592,493.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,339.64 : 892,911.72 = 429,543.60 : x
  2. Step 2: Convert to fraction form
    647,339.64/892,911.72 = 429,543.60/x
  3. Step 3: Cross multiply
    647,339.64x = 892,911.72 × 429,543.60
  4. Step 4: Simplify right side
    647,339.64x = 383,544,514,690.99
  5. Step 5: Solve for x
    x = 383,544,514,690.99/647,339.64
  6. Step 6: Final answer
    x = 592,493.48

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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.