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Finding the Fourth Proportional to 370,711.20, 556,066.80 and 213,247.20

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Solution

The fourth proportional to 370,711.20, 556,066.80 and 213,247.20 is: 319,870.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,711.20 : 556,066.80 = 213,247.20 : x
  2. Step 2: Convert to fraction form
    370,711.20/556,066.80 = 213,247.20/x
  3. Step 3: Cross multiply
    370,711.20x = 556,066.80 × 213,247.20
  4. Step 4: Simplify right side
    370,711.20x = 118,579,688,112.96
  5. Step 5: Solve for x
    x = 118,579,688,112.96/370,711.20
  6. Step 6: Final answer
    x = 319,870.80

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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.