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Finding the Fourth Proportional to 389,458.70, 546,029.50 and 389,458.70

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Solution

The fourth proportional to 389,458.70, 546,029.50 and 389,458.70 is: 546,029.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,458.70 : 546,029.50 = 389,458.70 : x
  2. Step 2: Convert to fraction form
    389,458.70/546,029.50 = 389,458.70/x
  3. Step 3: Cross multiply
    389,458.70x = 546,029.50 × 389,458.70
  4. Step 4: Simplify right side
    389,458.70x = 212,655,939,231.65
  5. Step 5: Solve for x
    x = 212,655,939,231.65/389,458.70
  6. Step 6: Final answer
    x = 546,029.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.