Home / 859,638.10-1,289,457.15-434,485.30

Finding the Fourth Proportional to 859,638.10, 1,289,457.15 and 434,485.30

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Solution

The fourth proportional to 859,638.10, 1,289,457.15 and 434,485.30 is: 651,727.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,638.10 : 1,289,457.15 = 434,485.30 : x
  2. Step 2: Convert to fraction form
    859,638.10/1,289,457.15 = 434,485.30/x
  3. Step 3: Cross multiply
    859,638.10x = 1,289,457.15 × 434,485.30
  4. Step 4: Simplify right side
    859,638.10x = 560,250,176,654.90
  5. Step 5: Solve for x
    x = 560,250,176,654.90/859,638.10
  6. Step 6: Final answer
    x = 651,727.95

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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.