Home / 500,340.96-690,407.28-398,624.40

Finding the Fourth Proportional to 500,340.96, 690,407.28 and 398,624.40

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Solution

The fourth proportional to 500,340.96, 690,407.28 and 398,624.40 is: 550,051.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,340.96 : 690,407.28 = 398,624.40 : x
  2. Step 2: Convert to fraction form
    500,340.96/690,407.28 = 398,624.40/x
  3. Step 3: Cross multiply
    500,340.96x = 690,407.28 × 398,624.40
  4. Step 4: Simplify right side
    500,340.96x = 275,213,187,745.63
  5. Step 5: Solve for x
    x = 275,213,187,745.63/500,340.96
  6. Step 6: Final answer
    x = 550,051.28

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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.