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Finding the Fourth Proportional to 778,608.18, 1,074,275.88 and 456,144.90

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Solution

The fourth proportional to 778,608.18, 1,074,275.88 and 456,144.90 is: 629,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,608.18 : 1,074,275.88 = 456,144.90 : x
  2. Step 2: Convert to fraction form
    778,608.18/1,074,275.88 = 456,144.90/x
  3. Step 3: Cross multiply
    778,608.18x = 1,074,275.88 × 456,144.90
  4. Step 4: Simplify right side
    778,608.18x = 490,025,463,855.01
  5. Step 5: Solve for x
    x = 490,025,463,855.01/778,608.18
  6. Step 6: Final answer
    x = 629,360.80

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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.