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Finding the Fourth Proportional to 492,137.60, 738,206.40 and 429,929.60

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Solution

The fourth proportional to 492,137.60, 738,206.40 and 429,929.60 is: 644,894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,137.60 : 738,206.40 = 429,929.60 : x
  2. Step 2: Convert to fraction form
    492,137.60/738,206.40 = 429,929.60/x
  3. Step 3: Cross multiply
    492,137.60x = 738,206.40 × 429,929.60
  4. Step 4: Simplify right side
    492,137.60x = 317,376,782,269.44
  5. Step 5: Solve for x
    x = 317,376,782,269.44/492,137.60
  6. Step 6: Final answer
    x = 644,894.40

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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.