Home / 745,489.90-1,028,787.78-405,957.88

Finding the Fourth Proportional to 745,489.90, 1,028,787.78 and 405,957.88

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Solution

The fourth proportional to 745,489.90, 1,028,787.78 and 405,957.88 is: 560,228.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,489.90 : 1,028,787.78 = 405,957.88 : x
  2. Step 2: Convert to fraction form
    745,489.90/1,028,787.78 = 405,957.88/x
  3. Step 3: Cross multiply
    745,489.90x = 1,028,787.78 × 405,957.88
  4. Step 4: Simplify right side
    745,489.90x = 417,644,506,138.71
  5. Step 5: Solve for x
    x = 417,644,506,138.71/745,489.90
  6. Step 6: Final answer
    x = 560,228.26

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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.