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Finding the Fourth Proportional to 439,547.80, 659,321.70 and 398,869.60

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Solution

The fourth proportional to 439,547.80, 659,321.70 and 398,869.60 is: 598,304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,547.80 : 659,321.70 = 398,869.60 : x
  2. Step 2: Convert to fraction form
    439,547.80/659,321.70 = 398,869.60/x
  3. Step 3: Cross multiply
    439,547.80x = 659,321.70 × 398,869.60
  4. Step 4: Simplify right side
    439,547.80x = 262,983,382,750.32
  5. Step 5: Solve for x
    x = 262,983,382,750.32/439,547.80
  6. Step 6: Final answer
    x = 598,304.40

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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.