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Finding the Fourth Proportional to 389,156.88, 579,866.62 and 346,710.72

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Solution

The fourth proportional to 389,156.88, 579,866.62 and 346,710.72 is: 516,619.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,156.88 : 579,866.62 = 346,710.72 : x
  2. Step 2: Convert to fraction form
    389,156.88/579,866.62 = 346,710.72/x
  3. Step 3: Cross multiply
    389,156.88x = 579,866.62 × 346,710.72
  4. Step 4: Simplify right side
    389,156.88x = 201,045,973,324.17
  5. Step 5: Solve for x
    x = 201,045,973,324.17/389,156.88
  6. Step 6: Final answer
    x = 516,619.35

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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.