Home / 680,005.76-1,020,000.32-305,764.48

Finding the Fourth Proportional to 680,005.76, 1,020,000.32 and 305,764.48

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Solution

The fourth proportional to 680,005.76, 1,020,000.32 and 305,764.48 is: 458,642.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,005.76 : 1,020,000.32 = 305,764.48 : x
  2. Step 2: Convert to fraction form
    680,005.76/1,020,000.32 = 305,764.48/x
  3. Step 3: Cross multiply
    680,005.76x = 1,020,000.32 × 305,764.48
  4. Step 4: Simplify right side
    680,005.76x = 311,879,867,444.63
  5. Step 5: Solve for x
    x = 311,879,867,444.63/680,005.76
  6. Step 6: Final answer
    x = 458,642.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.