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Finding the Fourth Proportional to 485,563.60, 670,225.92 and 281,666.08

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Solution

The fourth proportional to 485,563.60, 670,225.92 and 281,666.08 is: 388,785.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,563.60 : 670,225.92 = 281,666.08 : x
  2. Step 2: Convert to fraction form
    485,563.60/670,225.92 = 281,666.08/x
  3. Step 3: Cross multiply
    485,563.60x = 670,225.92 × 281,666.08
  4. Step 4: Simplify right side
    485,563.60x = 188,779,907,600.79
  5. Step 5: Solve for x
    x = 188,779,907,600.79/485,563.60
  6. Step 6: Final answer
    x = 388,785.13

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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.