Home / 860,350.40-1,290,525.60-487,102.40

Finding the Fourth Proportional to 860,350.40, 1,290,525.60 and 487,102.40

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Solution

The fourth proportional to 860,350.40, 1,290,525.60 and 487,102.40 is: 730,653.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,350.40 : 1,290,525.60 = 487,102.40 : x
  2. Step 2: Convert to fraction form
    860,350.40/1,290,525.60 = 487,102.40/x
  3. Step 3: Cross multiply
    860,350.40x = 1,290,525.60 × 487,102.40
  4. Step 4: Simplify right side
    860,350.40x = 628,618,117,021.44
  5. Step 5: Solve for x
    x = 628,618,117,021.44/860,350.40
  6. Step 6: Final answer
    x = 730,653.60

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Double scale
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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.