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Finding the Fourth Proportional to 402,189.05, 554,815.58 and 256,842.05

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Solution

The fourth proportional to 402,189.05, 554,815.58 and 256,842.05 is: 354,310.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,189.05 : 554,815.58 = 256,842.05 : x
  2. Step 2: Convert to fraction form
    402,189.05/554,815.58 = 256,842.05/x
  3. Step 3: Cross multiply
    402,189.05x = 554,815.58 × 256,842.05
  4. Step 4: Simplify right side
    402,189.05x = 142,499,966,880.85
  5. Step 5: Solve for x
    x = 142,499,966,880.85/402,189.05
  6. Step 6: Final answer
    x = 354,310.91

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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.