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Finding the Fourth Proportional to 630,675.64, 870,029.68 and 412,788.39

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Solution

The fourth proportional to 630,675.64, 870,029.68 and 412,788.39 is: 569,449.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,675.64 : 870,029.68 = 412,788.39 : x
  2. Step 2: Convert to fraction form
    630,675.64/870,029.68 = 412,788.39/x
  3. Step 3: Cross multiply
    630,675.64x = 870,029.68 × 412,788.39
  4. Step 4: Simplify right side
    630,675.64x = 359,138,149,716.31
  5. Step 5: Solve for x
    x = 359,138,149,716.31/630,675.64
  6. Step 6: Final answer
    x = 569,449.85

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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.