Home / 645,928.29-890,457.03-454,347.09

Finding the Fourth Proportional to 645,928.29, 890,457.03 and 454,347.09

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Solution

The fourth proportional to 645,928.29, 890,457.03 and 454,347.09 is: 626,349.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,928.29 : 890,457.03 = 454,347.09 : x
  2. Step 2: Convert to fraction form
    645,928.29/890,457.03 = 454,347.09/x
  3. Step 3: Cross multiply
    645,928.29x = 890,457.03 × 454,347.09
  4. Step 4: Simplify right side
    645,928.29x = 404,576,560,350.54
  5. Step 5: Solve for x
    x = 404,576,560,350.54/645,928.29
  6. Step 6: Final answer
    x = 626,349.03

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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.