Home / 651,081.40-976,476.30-428,007.40

Finding the Fourth Proportional to 651,081.40, 976,476.30 and 428,007.40

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Solution

The fourth proportional to 651,081.40, 976,476.30 and 428,007.40 is: 641,915.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,081.40 : 976,476.30 = 428,007.40 : x
  2. Step 2: Convert to fraction form
    651,081.40/976,476.30 = 428,007.40/x
  3. Step 3: Cross multiply
    651,081.40x = 976,476.30 × 428,007.40
  4. Step 4: Simplify right side
    651,081.40x = 417,939,082,324.62
  5. Step 5: Solve for x
    x = 417,939,082,324.62/651,081.40
  6. Step 6: Final answer
    x = 641,915.25

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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.