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Finding the Fourth Proportional to 389,095.45, 579,775.32 and 346,649.42

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Solution

The fourth proportional to 389,095.45, 579,775.32 and 346,649.42 is: 516,528.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,095.45 : 579,775.32 = 346,649.42 : x
  2. Step 2: Convert to fraction form
    389,095.45/579,775.32 = 346,649.42/x
  3. Step 3: Cross multiply
    389,095.45x = 579,775.32 × 346,649.42
  4. Step 4: Simplify right side
    389,095.45x = 200,978,779,857.75
  5. Step 5: Solve for x
    x = 200,978,779,857.75/389,095.45
  6. Step 6: Final answer
    x = 516,528.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.