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Finding the Fourth Proportional to 704,986.48, 972,865.82 and 399,056.76

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Solution

The fourth proportional to 704,986.48, 972,865.82 and 399,056.76 is: 550,689.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,986.48 : 972,865.82 = 399,056.76 : x
  2. Step 2: Convert to fraction form
    704,986.48/972,865.82 = 399,056.76/x
  3. Step 3: Cross multiply
    704,986.48x = 972,865.82 × 399,056.76
  4. Step 4: Simplify right side
    704,986.48x = 388,228,682,043.94
  5. Step 5: Solve for x
    x = 388,228,682,043.94/704,986.48
  6. Step 6: Final answer
    x = 550,689.54

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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.