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Finding the Fourth Proportional to 439,815.10, 616,985.30 and 439,815.10

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Solution

The fourth proportional to 439,815.10, 616,985.30 and 439,815.10 is: 616,985.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,815.10 : 616,985.30 = 439,815.10 : x
  2. Step 2: Convert to fraction form
    439,815.10/616,985.30 = 439,815.10/x
  3. Step 3: Cross multiply
    439,815.10x = 616,985.30 × 439,815.10
  4. Step 4: Simplify right side
    439,815.10x = 271,359,451,418.03
  5. Step 5: Solve for x
    x = 271,359,451,418.03/439,815.10
  6. Step 6: Final answer
    x = 616,985.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.