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Finding the Fourth Proportional to 586,671.12, 809,606.48 and 318,399.12

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Solution

The fourth proportional to 586,671.12, 809,606.48 and 318,399.12 is: 439,390.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,671.12 : 809,606.48 = 318,399.12 : x
  2. Step 2: Convert to fraction form
    586,671.12/809,606.48 = 318,399.12/x
  3. Step 3: Cross multiply
    586,671.12x = 809,606.48 × 318,399.12
  4. Step 4: Simplify right side
    586,671.12x = 257,777,989,186.30
  5. Step 5: Solve for x
    x = 257,777,989,186.30/586,671.12
  6. Step 6: Final answer
    x = 439,390.96

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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.