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Finding the Fourth Proportional to 355,318.55, 490,858.18 and 307,488.86

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Solution

The fourth proportional to 355,318.55, 490,858.18 and 307,488.86 is: 424,783.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,318.55 : 490,858.18 = 307,488.86 : x
  2. Step 2: Convert to fraction form
    355,318.55/490,858.18 = 307,488.86/x
  3. Step 3: Cross multiply
    355,318.55x = 490,858.18 × 307,488.86
  4. Step 4: Simplify right side
    355,318.55x = 150,933,420,807.58
  5. Step 5: Solve for x
    x = 150,933,420,807.58/355,318.55
  6. Step 6: Final answer
    x = 424,783.40

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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.