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Finding the Fourth Proportional to 660,560.96, 911,575.87 and 388,639.10

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Solution

The fourth proportional to 660,560.96, 911,575.87 and 388,639.10 is: 536,322.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,560.96 : 911,575.87 = 388,639.10 : x
  2. Step 2: Convert to fraction form
    660,560.96/911,575.87 = 388,639.10/x
  3. Step 3: Cross multiply
    660,560.96x = 911,575.87 × 388,639.10
  4. Step 4: Simplify right side
    660,560.96x = 354,274,020,169.04
  5. Step 5: Solve for x
    x = 354,274,020,169.04/660,560.96
  6. Step 6: Final answer
    x = 536,322.98

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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.