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Finding the Fourth Proportional to 571,021.40, 856,532.10 and 518,533.40

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Solution

The fourth proportional to 571,021.40, 856,532.10 and 518,533.40 is: 777,800.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,021.40 : 856,532.10 = 518,533.40 : x
  2. Step 2: Convert to fraction form
    571,021.40/856,532.10 = 518,533.40/x
  3. Step 3: Cross multiply
    571,021.40x = 856,532.10 × 518,533.40
  4. Step 4: Simplify right side
    571,021.40x = 444,140,502,022.14
  5. Step 5: Solve for x
    x = 444,140,502,022.14/571,021.40
  6. Step 6: Final answer
    x = 777,800.10

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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.