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Finding the Fourth Proportional to 563,860.63, 778,145.70 and 309,211.21

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Solution

The fourth proportional to 563,860.63, 778,145.70 and 309,211.21 is: 426,721.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,860.63 : 778,145.70 = 309,211.21 : x
  2. Step 2: Convert to fraction form
    563,860.63/778,145.70 = 309,211.21/x
  3. Step 3: Cross multiply
    563,860.63x = 778,145.70 × 309,211.21
  4. Step 4: Simplify right side
    563,860.63x = 240,611,373,453.30
  5. Step 5: Solve for x
    x = 240,611,373,453.30/563,860.63
  6. Step 6: Final answer
    x = 426,721.36

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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.