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Finding the Fourth Proportional to 637,688.21, 879,969.35 and 351,208.30

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Solution

The fourth proportional to 637,688.21, 879,969.35 and 351,208.30 is: 484,645.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,688.21 : 879,969.35 = 351,208.30 : x
  2. Step 2: Convert to fraction form
    637,688.21/879,969.35 = 351,208.30/x
  3. Step 3: Cross multiply
    637,688.21x = 879,969.35 × 351,208.30
  4. Step 4: Simplify right side
    637,688.21x = 309,052,539,465.61
  5. Step 5: Solve for x
    x = 309,052,539,465.61/637,688.21
  6. Step 6: Final answer
    x = 484,645.21

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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.