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Finding the Fourth Proportional to 620,205.60, 930,308.40 and 383,815.20

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Solution

The fourth proportional to 620,205.60, 930,308.40 and 383,815.20 is: 575,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,205.60 : 930,308.40 = 383,815.20 : x
  2. Step 2: Convert to fraction form
    620,205.60/930,308.40 = 383,815.20/x
  3. Step 3: Cross multiply
    620,205.60x = 930,308.40 × 383,815.20
  4. Step 4: Simplify right side
    620,205.60x = 357,066,504,607.68
  5. Step 5: Solve for x
    x = 357,066,504,607.68/620,205.60
  6. Step 6: Final answer
    x = 575,722.80

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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.