Home / 345,698.20-518,547.30-215,903.80

Finding the Fourth Proportional to 345,698.20, 518,547.30 and 215,903.80

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Solution

The fourth proportional to 345,698.20, 518,547.30 and 215,903.80 is: 323,855.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,698.20 : 518,547.30 = 215,903.80 : x
  2. Step 2: Convert to fraction form
    345,698.20/518,547.30 = 215,903.80/x
  3. Step 3: Cross multiply
    345,698.20x = 518,547.30 × 215,903.80
  4. Step 4: Simplify right side
    345,698.20x = 111,956,332,549.74
  5. Step 5: Solve for x
    x = 111,956,332,549.74/345,698.20
  6. Step 6: Final answer
    x = 323,855.70

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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.