Home / 684,136.80-1,026,205.20-432,194.40

Finding the Fourth Proportional to 684,136.80, 1,026,205.20 and 432,194.40

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Solution

The fourth proportional to 684,136.80, 1,026,205.20 and 432,194.40 is: 648,291.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,136.80 : 1,026,205.20 = 432,194.40 : x
  2. Step 2: Convert to fraction form
    684,136.80/1,026,205.20 = 432,194.40/x
  3. Step 3: Cross multiply
    684,136.80x = 1,026,205.20 × 432,194.40
  4. Step 4: Simplify right side
    684,136.80x = 443,520,140,690.88
  5. Step 5: Solve for x
    x = 443,520,140,690.88/684,136.80
  6. Step 6: Final answer
    x = 648,291.60

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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.