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Finding the Fourth Proportional to 500,479.08, 690,598.02 and 398,762.28

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Solution

The fourth proportional to 500,479.08, 690,598.02 and 398,762.28 is: 550,241.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,479.08 : 690,598.02 = 398,762.28 : x
  2. Step 2: Convert to fraction form
    500,479.08/690,598.02 = 398,762.28/x
  3. Step 3: Cross multiply
    500,479.08x = 690,598.02 × 398,762.28
  4. Step 4: Simplify right side
    500,479.08x = 275,384,441,018.69
  5. Step 5: Solve for x
    x = 275,384,441,018.69/500,479.08
  6. Step 6: Final answer
    x = 550,241.66

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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.