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Finding the Fourth Proportional to 718,628.80, 991,706.16 and 432,315.04

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Solution

The fourth proportional to 718,628.80, 991,706.16 and 432,315.04 is: 596,593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,628.80 : 991,706.16 = 432,315.04 : x
  2. Step 2: Convert to fraction form
    718,628.80/991,706.16 = 432,315.04/x
  3. Step 3: Cross multiply
    718,628.80x = 991,706.16 × 432,315.04
  4. Step 4: Simplify right side
    718,628.80x = 428,729,488,228.65
  5. Step 5: Solve for x
    x = 428,729,488,228.65/718,628.80
  6. Step 6: Final answer
    x = 596,593.80

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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.