Home / 500,347.46-690,416.25-398,630.90

Finding the Fourth Proportional to 500,347.46, 690,416.25 and 398,630.90

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Solution

The fourth proportional to 500,347.46, 690,416.25 and 398,630.90 is: 550,060.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,347.46 : 690,416.25 = 398,630.90 : x
  2. Step 2: Convert to fraction form
    500,347.46/690,416.25 = 398,630.90/x
  3. Step 3: Cross multiply
    500,347.46x = 690,416.25 × 398,630.90
  4. Step 4: Simplify right side
    500,347.46x = 275,221,251,112.13
  5. Step 5: Solve for x
    x = 275,221,251,112.13/500,347.46
  6. Step 6: Final answer
    x = 550,060.25

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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.