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Finding the Fourth Proportional to 486,539.40, 728,253.90 and 346,571.40

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Solution

The fourth proportional to 486,539.40, 728,253.90 and 346,571.40 is: 518,749.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,539.40 : 728,253.90 = 346,571.40 : x
  2. Step 2: Convert to fraction form
    486,539.40/728,253.90 = 346,571.40/x
  3. Step 3: Cross multiply
    486,539.40x = 728,253.90 × 346,571.40
  4. Step 4: Simplify right side
    486,539.40x = 252,391,973,678.46
  5. Step 5: Solve for x
    x = 252,391,973,678.46/486,539.40
  6. Step 6: Final answer
    x = 518,749.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.