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Finding the Fourth Proportional to 420,486.90, 630,730.35 and 252,525.30

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Solution

The fourth proportional to 420,486.90, 630,730.35 and 252,525.30 is: 378,787.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,486.90 : 630,730.35 = 252,525.30 : x
  2. Step 2: Convert to fraction form
    420,486.90/630,730.35 = 252,525.30/x
  3. Step 3: Cross multiply
    420,486.90x = 630,730.35 × 252,525.30
  4. Step 4: Simplify right side
    420,486.90x = 159,275,370,852.86
  5. Step 5: Solve for x
    x = 159,275,370,852.86/420,486.90
  6. Step 6: Final answer
    x = 378,787.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.