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Finding the Fourth Proportional to 628,124.04, 867,699 and 486,707.76

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Solution

The fourth proportional to 628,124.04, 867,699 and 486,707.76 is: 672,344.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,124.04 : 867,699 = 486,707.76 : x
  2. Step 2: Convert to fraction form
    628,124.04/867,699 = 486,707.76/x
  3. Step 3: Cross multiply
    628,124.04x = 867,699 × 486,707.76
  4. Step 4: Simplify right side
    628,124.04x = 422,315,836,644.24
  5. Step 5: Solve for x
    x = 422,315,836,644.24/628,124.04
  6. Step 6: Final answer
    x = 672,344.65

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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.