Home / 485,865.18-670,465.08-281,900.30

Finding the Fourth Proportional to 485,865.18, 670,465.08 and 281,900.30

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Solution

The fourth proportional to 485,865.18, 670,465.08 and 281,900.30 is: 389,005.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,865.18 : 670,465.08 = 281,900.30 : x
  2. Step 2: Convert to fraction form
    485,865.18/670,465.08 = 281,900.30/x
  3. Step 3: Cross multiply
    485,865.18x = 670,465.08 × 281,900.30
  4. Step 4: Simplify right side
    485,865.18x = 189,004,303,839.20
  5. Step 5: Solve for x
    x = 189,004,303,839.20/485,865.18
  6. Step 6: Final answer
    x = 389,005.66

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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.