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Finding the Fourth Proportional to 660,459.12, 911,438.64 and 358,653.12

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Solution

The fourth proportional to 660,459.12, 911,438.64 and 358,653.12 is: 494,944.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,459.12 : 911,438.64 = 358,653.12 : x
  2. Step 2: Convert to fraction form
    660,459.12/911,438.64 = 358,653.12/x
  3. Step 3: Cross multiply
    660,459.12x = 911,438.64 × 358,653.12
  4. Step 4: Simplify right side
    660,459.12x = 326,890,311,924.56
  5. Step 5: Solve for x
    x = 326,890,311,924.56/660,459.12
  6. Step 6: Final answer
    x = 494,944.05

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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.