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Finding the Fourth Proportional to 660,740.50, 911,744.53 and 388,748.58

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Solution

The fourth proportional to 660,740.50, 911,744.53 and 388,748.58 is: 536,427.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,740.50 : 911,744.53 = 388,748.58 : x
  2. Step 2: Convert to fraction form
    660,740.50/911,744.53 = 388,748.58/x
  3. Step 3: Cross multiply
    660,740.50x = 911,744.53 × 388,748.58
  4. Step 4: Simplify right side
    660,740.50x = 354,439,391,360.27
  5. Step 5: Solve for x
    x = 354,439,391,360.27/660,740.50
  6. Step 6: Final answer
    x = 536,427.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.