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Finding the Fourth Proportional to 289,970.40, 435,830.40 and 251,479.20

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Solution

The fourth proportional to 289,970.40, 435,830.40 and 251,479.20 is: 377,977.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,970.40 : 435,830.40 = 251,479.20 : x
  2. Step 2: Convert to fraction form
    289,970.40/435,830.40 = 251,479.20/x
  3. Step 3: Cross multiply
    289,970.40x = 435,830.40 × 251,479.20
  4. Step 4: Simplify right side
    289,970.40x = 109,602,280,327.68
  5. Step 5: Solve for x
    x = 109,602,280,327.68/289,970.40
  6. Step 6: Final answer
    x = 377,977.48

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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.