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Finding the Fourth Proportional to 579,704.60, 812,139.40 and 579,704.60

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Solution

The fourth proportional to 579,704.60, 812,139.40 and 579,704.60 is: 812,139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,704.60 : 812,139.40 = 579,704.60 : x
  2. Step 2: Convert to fraction form
    579,704.60/812,139.40 = 579,704.60/x
  3. Step 3: Cross multiply
    579,704.60x = 812,139.40 × 579,704.60
  4. Step 4: Simplify right side
    579,704.60x = 470,800,946,021.24
  5. Step 5: Solve for x
    x = 470,800,946,021.24/579,704.60
  6. Step 6: Final answer
    x = 812,139.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.