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Finding the Fourth Proportional to 579,709.10, 812,145.70 and 579,709.10

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Solution

The fourth proportional to 579,709.10, 812,145.70 and 579,709.10 is: 812,145.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,709.10 : 812,145.70 = 579,709.10 : x
  2. Step 2: Convert to fraction form
    579,709.10/812,145.70 = 579,709.10/x
  3. Step 3: Cross multiply
    579,709.10x = 812,145.70 × 579,709.10
  4. Step 4: Simplify right side
    579,709.10x = 470,808,252,815.87
  5. Step 5: Solve for x
    x = 470,808,252,815.87/579,709.10
  6. Step 6: Final answer
    x = 812,145.70

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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.