Home / 813,742.40-1,220,613.60-768,123.20

Finding the Fourth Proportional to 813,742.40, 1,220,613.60 and 768,123.20

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Solution

The fourth proportional to 813,742.40, 1,220,613.60 and 768,123.20 is: 1,152,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,742.40 : 1,220,613.60 = 768,123.20 : x
  2. Step 2: Convert to fraction form
    813,742.40/1,220,613.60 = 768,123.20/x
  3. Step 3: Cross multiply
    813,742.40x = 1,220,613.60 × 768,123.20
  4. Step 4: Simplify right side
    813,742.40x = 937,581,624,395.52
  5. Step 5: Solve for x
    x = 937,581,624,395.52/813,742.40
  6. Step 6: Final answer
    x = 1,152,184.80

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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.