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Finding the Fourth Proportional to 615,640.55, 924,028.50 and 312,247.64

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Solution

The fourth proportional to 615,640.55, 924,028.50 and 312,247.64 is: 468,659.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,640.55 : 924,028.50 = 312,247.64 : x
  2. Step 2: Convert to fraction form
    615,640.55/924,028.50 = 312,247.64/x
  3. Step 3: Cross multiply
    615,640.55x = 924,028.50 × 312,247.64
  4. Step 4: Simplify right side
    615,640.55x = 288,525,720,581.45
  5. Step 5: Solve for x
    x = 288,525,720,581.45/615,640.55
  6. Step 6: Final answer
    x = 468,659.38

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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.