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Finding the Fourth Proportional to 660,740.76, 911,744.88 and 388,748.82

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Solution

The fourth proportional to 660,740.76, 911,744.88 and 388,748.82 is: 536,427.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,740.76 : 911,744.88 = 388,748.82 : x
  2. Step 2: Convert to fraction form
    660,740.76/911,744.88 = 388,748.82/x
  3. Step 3: Cross multiply
    660,740.76x = 911,744.88 × 388,748.82
  4. Step 4: Simplify right side
    660,740.76x = 354,439,746,241.04
  5. Step 5: Solve for x
    x = 354,439,746,241.04/660,740.76
  6. Step 6: Final answer
    x = 536,427.85

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1.5x scale

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.