Home / 874,421.20-1,311,631.80-313,512.40

Finding the Fourth Proportional to 874,421.20, 1,311,631.80 and 313,512.40

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Solution

The fourth proportional to 874,421.20, 1,311,631.80 and 313,512.40 is: 470,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,421.20 : 1,311,631.80 = 313,512.40 : x
  2. Step 2: Convert to fraction form
    874,421.20/1,311,631.80 = 313,512.40/x
  3. Step 3: Cross multiply
    874,421.20x = 1,311,631.80 × 313,512.40
  4. Step 4: Simplify right side
    874,421.20x = 411,212,833,534.32
  5. Step 5: Solve for x
    x = 411,212,833,534.32/874,421.20
  6. Step 6: Final answer
    x = 470,268.60

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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.