Home / 442,521,985.20-663,782,977.80-212,939,473.20

Finding the Fourth Proportional to 442,521,985.20, 663,782,977.80 and 212,939,473.20

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Solution

The fourth proportional to 442,521,985.20, 663,782,977.80 and 212,939,473.20 is: 319,409,209.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,521,985.20 : 663,782,977.80 = 212,939,473.20 : x
  2. Step 2: Convert to fraction form
    442,521,985.20/663,782,977.80 = 212,939,473.20/x
  3. Step 3: Cross multiply
    442,521,985.20x = 663,782,977.80 × 212,939,473.20
  4. Step 4: Simplify right side
    442,521,985.20x = 141,345,597,611,859,280
  5. Step 5: Solve for x
    x = 141,345,597,611,859,280/442,521,985.20
  6. Step 6: Final answer
    x = 319,409,209.80

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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.