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Finding the Fourth Proportional to 788,612.80, 1,183,210.80 and 256,151.20

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Solution

The fourth proportional to 788,612.80, 1,183,210.80 and 256,151.20 is: 384,321.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,612.80 : 1,183,210.80 = 256,151.20 : x
  2. Step 2: Convert to fraction form
    788,612.80/1,183,210.80 = 256,151.20/x
  3. Step 3: Cross multiply
    788,612.80x = 1,183,210.80 × 256,151.20
  4. Step 4: Simplify right side
    788,612.80x = 303,080,866,272.96
  5. Step 5: Solve for x
    x = 303,080,866,272.96/788,612.80
  6. Step 6: Final answer
    x = 384,321.52

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1.5x scale

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.