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Finding the Fourth Proportional to 426,673.80, 640,010.70 and 216,721.80

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Solution

The fourth proportional to 426,673.80, 640,010.70 and 216,721.80 is: 325,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,673.80 : 640,010.70 = 216,721.80 : x
  2. Step 2: Convert to fraction form
    426,673.80/640,010.70 = 216,721.80/x
  3. Step 3: Cross multiply
    426,673.80x = 640,010.70 × 216,721.80
  4. Step 4: Simplify right side
    426,673.80x = 138,704,270,923.26
  5. Step 5: Solve for x
    x = 138,704,270,923.26/426,673.80
  6. Step 6: Final answer
    x = 325,082.70

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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.