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Finding the Fourth Proportional to 493,428.15, 680,936.58 and 289,482.57

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Solution

The fourth proportional to 493,428.15, 680,936.58 and 289,482.57 is: 399,489.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,428.15 : 680,936.58 = 289,482.57 : x
  2. Step 2: Convert to fraction form
    493,428.15/680,936.58 = 289,482.57/x
  3. Step 3: Cross multiply
    493,428.15x = 680,936.58 × 289,482.57
  4. Step 4: Simplify right side
    493,428.15x = 197,119,271,185.41
  5. Step 5: Solve for x
    x = 197,119,271,185.41/493,428.15
  6. Step 6: Final answer
    x = 399,489.31

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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.