Home / 641,938.47-885,868.71-347,586.80

Finding the Fourth Proportional to 641,938.47, 885,868.71 and 347,586.80

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Solution

The fourth proportional to 641,938.47, 885,868.71 and 347,586.80 is: 479,666.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,938.47 : 885,868.71 = 347,586.80 : x
  2. Step 2: Convert to fraction form
    641,938.47/885,868.71 = 347,586.80/x
  3. Step 3: Cross multiply
    641,938.47x = 885,868.71 × 347,586.80
  4. Step 4: Simplify right side
    641,938.47x = 307,916,270,129.03
  5. Step 5: Solve for x
    x = 307,916,270,129.03/641,938.47
  6. Step 6: Final answer
    x = 479,666.33

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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.