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Finding the Fourth Proportional to 586,669, 809,603.22 and 318,397

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Solution

The fourth proportional to 586,669, 809,603.22 and 318,397 is: 439,387.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,669 : 809,603.22 = 318,397 : x
  2. Step 2: Convert to fraction form
    586,669/809,603.22 = 318,397/x
  3. Step 3: Cross multiply
    586,669x = 809,603.22 × 318,397
  4. Step 4: Simplify right side
    586,669x = 257,775,236,438.34
  5. Step 5: Solve for x
    x = 257,775,236,438.34/586,669
  6. Step 6: Final answer
    x = 439,387.86

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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.