Home / 849,174.30-1,272,711.69-428,220.54

Finding the Fourth Proportional to 849,174.30, 1,272,711.69 and 428,220.54

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Solution

The fourth proportional to 849,174.30, 1,272,711.69 and 428,220.54 is: 641,801.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    849,174.30 : 1,272,711.69 = 428,220.54 : x
  2. Step 2: Convert to fraction form
    849,174.30/1,272,711.69 = 428,220.54/x
  3. Step 3: Cross multiply
    849,174.30x = 1,272,711.69 × 428,220.54
  4. Step 4: Simplify right side
    849,174.30x = 545,001,287,156.11
  5. Step 5: Solve for x
    x = 545,001,287,156.11/849,174.30
  6. Step 6: Final answer
    x = 641,801.44

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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.