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Finding the Fourth Proportional to 486,011.10, 728,688.60 and 258,344.40

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Solution

The fourth proportional to 486,011.10, 728,688.60 and 258,344.40 is: 387,342.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,011.10 : 728,688.60 = 258,344.40 : x
  2. Step 2: Convert to fraction form
    486,011.10/728,688.60 = 258,344.40/x
  3. Step 3: Cross multiply
    486,011.10x = 728,688.60 × 258,344.40
  4. Step 4: Simplify right side
    486,011.10x = 188,252,619,153.84
  5. Step 5: Solve for x
    x = 188,252,619,153.84/486,011.10
  6. Step 6: Final answer
    x = 387,342.22

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1.5x scale

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.