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Finding the Fourth Proportional to 573,412.12, 791,329 and 315,308.64

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Solution

The fourth proportional to 573,412.12, 791,329 and 315,308.64 is: 435,137.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,412.12 : 791,329 = 315,308.64 : x
  2. Step 2: Convert to fraction form
    573,412.12/791,329 = 315,308.64/x
  3. Step 3: Cross multiply
    573,412.12x = 791,329 × 315,308.64
  4. Step 4: Simplify right side
    573,412.12x = 249,512,870,782.56
  5. Step 5: Solve for x
    x = 249,512,870,782.56/573,412.12
  6. Step 6: Final answer
    x = 435,137.07

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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.