Home / 784,978.23-1,083,438.80-478,989.09

Finding the Fourth Proportional to 784,978.23, 1,083,438.80 and 478,989.09

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Solution

The fourth proportional to 784,978.23, 1,083,438.80 and 478,989.09 is: 661,107.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    784,978.23 : 1,083,438.80 = 478,989.09 : x
  2. Step 2: Convert to fraction form
    784,978.23/1,083,438.80 = 478,989.09/x
  3. Step 3: Cross multiply
    784,978.23x = 1,083,438.80 × 478,989.09
  4. Step 4: Simplify right side
    784,978.23x = 518,955,362,487.75
  5. Step 5: Solve for x
    x = 518,955,362,487.75/784,978.23
  6. Step 6: Final answer
    x = 661,107.97

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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.