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Finding the Fourth Proportional to 616,273.20, 924,409.80 and 427,316.40

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Solution

The fourth proportional to 616,273.20, 924,409.80 and 427,316.40 is: 640,974.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,273.20 : 924,409.80 = 427,316.40 : x
  2. Step 2: Convert to fraction form
    616,273.20/924,409.80 = 427,316.40/x
  3. Step 3: Cross multiply
    616,273.20x = 924,409.80 × 427,316.40
  4. Step 4: Simplify right side
    616,273.20x = 395,015,467,860.72
  5. Step 5: Solve for x
    x = 395,015,467,860.72/616,273.20
  6. Step 6: Final answer
    x = 640,974.60

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Similar ratio
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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.