Home / 778,409.28-1,074,211.20-456,128.64

Finding the Fourth Proportional to 778,409.28, 1,074,211.20 and 456,128.64

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Solution

The fourth proportional to 778,409.28, 1,074,211.20 and 456,128.64 is: 629,461.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,409.28 : 1,074,211.20 = 456,128.64 : x
  2. Step 2: Convert to fraction form
    778,409.28/1,074,211.20 = 456,128.64/x
  3. Step 3: Cross multiply
    778,409.28x = 1,074,211.20 × 456,128.64
  4. Step 4: Simplify right side
    778,409.28x = 489,978,493,728.77
  5. Step 5: Solve for x
    x = 489,978,493,728.77/778,409.28
  6. Step 6: Final answer
    x = 629,461.27

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Double scale
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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.