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Finding the Fourth Proportional to 788,686.80, 1,183,321.80 and 256,225.20

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Solution

The fourth proportional to 788,686.80, 1,183,321.80 and 256,225.20 is: 384,432.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,686.80 : 1,183,321.80 = 256,225.20 : x
  2. Step 2: Convert to fraction form
    788,686.80/1,183,321.80 = 256,225.20/x
  3. Step 3: Cross multiply
    788,686.80x = 1,183,321.80 × 256,225.20
  4. Step 4: Simplify right side
    788,686.80x = 303,196,864,869.36
  5. Step 5: Solve for x
    x = 303,196,864,869.36/788,686.80
  6. Step 6: Final answer
    x = 384,432.53

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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.