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Finding the Fourth Proportional to 370,921.80, 556,965.90 and 213,457.80

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Solution

The fourth proportional to 370,921.80, 556,965.90 and 213,457.80 is: 320,522.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,921.80 : 556,965.90 = 213,457.80 : x
  2. Step 2: Convert to fraction form
    370,921.80/556,965.90 = 213,457.80/x
  3. Step 3: Cross multiply
    370,921.80x = 556,965.90 × 213,457.80
  4. Step 4: Simplify right side
    370,921.80x = 118,888,715,689.02
  5. Step 5: Solve for x
    x = 118,888,715,689.02/370,921.80
  6. Step 6: Final answer
    x = 320,522.32

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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.