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Finding the Fourth Proportional to 543,365.10, 749,836.70 and 310,790.47

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Solution

The fourth proportional to 543,365.10, 749,836.70 and 310,790.47 is: 428,886.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,365.10 : 749,836.70 = 310,790.47 : x
  2. Step 2: Convert to fraction form
    543,365.10/749,836.70 = 310,790.47/x
  3. Step 3: Cross multiply
    543,365.10x = 749,836.70 × 310,790.47
  4. Step 4: Simplify right side
    543,365.10x = 233,042,099,777.63
  5. Step 5: Solve for x
    x = 233,042,099,777.63/543,365.10
  6. Step 6: Final answer
    x = 428,886.76

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1.5x scale

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.