Home / 664,421.87-916,583.25-434,878.10

Finding the Fourth Proportional to 664,421.87, 916,583.25 and 434,878.10

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Solution

The fourth proportional to 664,421.87, 916,583.25 and 434,878.10 is: 599,923.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,421.87 : 916,583.25 = 434,878.10 : x
  2. Step 2: Convert to fraction form
    664,421.87/916,583.25 = 434,878.10/x
  3. Step 3: Cross multiply
    664,421.87x = 916,583.25 × 434,878.10
  4. Step 4: Simplify right side
    664,421.87x = 398,601,982,251.83
  5. Step 5: Solve for x
    x = 398,601,982,251.83/664,421.87
  6. Step 6: Final answer
    x = 599,923.03

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.