Home / 427,834.30-640,828.78-402,681.64

Finding the Fourth Proportional to 427,834.30, 640,828.78 and 402,681.64

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Solution

The fourth proportional to 427,834.30, 640,828.78 and 402,681.64 is: 603,154.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,834.30 : 640,828.78 = 402,681.64 : x
  2. Step 2: Convert to fraction form
    427,834.30/640,828.78 = 402,681.64/x
  3. Step 3: Cross multiply
    427,834.30x = 640,828.78 × 402,681.64
  4. Step 4: Simplify right side
    427,834.30x = 258,049,982,076.19
  5. Step 5: Solve for x
    x = 258,049,982,076.19/427,834.30
  6. Step 6: Final answer
    x = 603,154.03

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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.