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Finding the Fourth Proportional to 558,017.55, 770,029.79 and 312,988.82

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Solution

The fourth proportional to 558,017.55, 770,029.79 and 312,988.82 is: 431,905.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,017.55 : 770,029.79 = 312,988.82 : x
  2. Step 2: Convert to fraction form
    558,017.55/770,029.79 = 312,988.82/x
  3. Step 3: Cross multiply
    558,017.55x = 770,029.79 × 312,988.82
  4. Step 4: Simplify right side
    558,017.55x = 241,010,709,921.86
  5. Step 5: Solve for x
    x = 241,010,709,921.86/558,017.55
  6. Step 6: Final answer
    x = 431,905.25

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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.