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Finding the Fourth Proportional to 493,485.42, 680,971.86 and 278,646.69

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Solution

The fourth proportional to 493,485.42, 680,971.86 and 278,646.69 is: 384,510.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,485.42 : 680,971.86 = 278,646.69 : x
  2. Step 2: Convert to fraction form
    493,485.42/680,971.86 = 278,646.69/x
  3. Step 3: Cross multiply
    493,485.42x = 680,971.86 × 278,646.69
  4. Step 4: Simplify right side
    493,485.42x = 189,750,554,772.14
  5. Step 5: Solve for x
    x = 189,750,554,772.14/493,485.42
  6. Step 6: Final answer
    x = 384,510.96

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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.