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Finding the Fourth Proportional to 615,911.20, 923,348.40 and 320,423.20

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Solution

The fourth proportional to 615,911.20, 923,348.40 and 320,423.20 is: 480,365.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,911.20 : 923,348.40 = 320,423.20 : x
  2. Step 2: Convert to fraction form
    615,911.20/923,348.40 = 320,423.20/x
  3. Step 3: Cross multiply
    615,911.20x = 923,348.40 × 320,423.20
  4. Step 4: Simplify right side
    615,911.20x = 295,862,249,042.88
  5. Step 5: Solve for x
    x = 295,862,249,042.88/615,911.20
  6. Step 6: Final answer
    x = 480,365.11

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1.5x scale

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.