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Finding the Fourth Proportional to 370,838.71, 556,279.59 and 143,135.59

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Solution

The fourth proportional to 370,838.71, 556,279.59 and 143,135.59 is: 214,711.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,838.71 : 556,279.59 = 143,135.59 : x
  2. Step 2: Convert to fraction form
    370,838.71/556,279.59 = 143,135.59/x
  3. Step 3: Cross multiply
    370,838.71x = 556,279.59 × 143,135.59
  4. Step 4: Simplify right side
    370,838.71x = 79,623,407,319.61
  5. Step 5: Solve for x
    x = 79,623,407,319.61/370,838.71
  6. Step 6: Final answer
    x = 214,711.69

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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.