Home / 689,783.20-1,034,674.80-290,874.40

Finding the Fourth Proportional to 689,783.20, 1,034,674.80 and 290,874.40

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Solution

The fourth proportional to 689,783.20, 1,034,674.80 and 290,874.40 is: 436,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,783.20 : 1,034,674.80 = 290,874.40 : x
  2. Step 2: Convert to fraction form
    689,783.20/1,034,674.80 = 290,874.40/x
  3. Step 3: Cross multiply
    689,783.20x = 1,034,674.80 × 290,874.40
  4. Step 4: Simplify right side
    689,783.20x = 300,960,411,645.12
  5. Step 5: Solve for x
    x = 300,960,411,645.12/689,783.20
  6. Step 6: Final answer
    x = 436,311.60

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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.