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Finding the Fourth Proportional to 357,156.80, 535,735.20 and 278,330

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Solution

The fourth proportional to 357,156.80, 535,735.20 and 278,330 is: 417,495

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,156.80 : 535,735.20 = 278,330 : x
  2. Step 2: Convert to fraction form
    357,156.80/535,735.20 = 278,330/x
  3. Step 3: Cross multiply
    357,156.80x = 535,735.20 × 278,330
  4. Step 4: Simplify right side
    357,156.80x = 149,111,178,216
  5. Step 5: Solve for x
    x = 149,111,178,216/357,156.80
  6. Step 6: Final answer
    x = 417,495

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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.