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Finding the Fourth Proportional to 579,401.60, 811,715.20 and 579,401.60

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Solution

The fourth proportional to 579,401.60, 811,715.20 and 579,401.60 is: 811,715.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,401.60 : 811,715.20 = 579,401.60 : x
  2. Step 2: Convert to fraction form
    579,401.60/811,715.20 = 579,401.60/x
  3. Step 3: Cross multiply
    579,401.60x = 811,715.20 × 579,401.60
  4. Step 4: Simplify right side
    579,401.60x = 470,309,085,624.32
  5. Step 5: Solve for x
    x = 470,309,085,624.32/579,401.60
  6. Step 6: Final answer
    x = 811,715.20

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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.