Home / 1,128,478.72-1,693,009.68-418,709.20

Finding the Fourth Proportional to 1,128,478.72, 1,693,009.68 and 418,709.20

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Solution

The fourth proportional to 1,128,478.72, 1,693,009.68 and 418,709.20 is: 628,171.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,478.72 : 1,693,009.68 = 418,709.20 : x
  2. Step 2: Convert to fraction form
    1,128,478.72/1,693,009.68 = 418,709.20/x
  3. Step 3: Cross multiply
    1,128,478.72x = 1,693,009.68 × 418,709.20
  4. Step 4: Simplify right side
    1,128,478.72x = 708,878,728,705.06
  5. Step 5: Solve for x
    x = 708,878,728,705.06/1,128,478.72
  6. Step 6: Final answer
    x = 628,171.99

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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.