Home / 778,128.75-1,073,900.23-456,109.40

Finding the Fourth Proportional to 778,128.75, 1,073,900.23 and 456,109.40

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Solution

The fourth proportional to 778,128.75, 1,073,900.23 and 456,109.40 is: 629,479.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,128.75 : 1,073,900.23 = 456,109.40 : x
  2. Step 2: Convert to fraction form
    778,128.75/1,073,900.23 = 456,109.40/x
  3. Step 3: Cross multiply
    778,128.75x = 1,073,900.23 × 456,109.40
  4. Step 4: Simplify right side
    778,128.75x = 489,815,989,565.16
  5. Step 5: Solve for x
    x = 489,815,989,565.16/778,128.75
  6. Step 6: Final answer
    x = 629,479.36

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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.