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Finding the Fourth Proportional to 586,579.89, 809,480.23 and 318,307.89

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Solution

The fourth proportional to 586,579.89, 809,480.23 and 318,307.89 is: 439,264.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,579.89 : 809,480.23 = 318,307.89 : x
  2. Step 2: Convert to fraction form
    586,579.89/809,480.23 = 318,307.89/x
  3. Step 3: Cross multiply
    586,579.89x = 809,480.23 × 318,307.89
  4. Step 4: Simplify right side
    586,579.89x = 257,663,944,008.02
  5. Step 5: Solve for x
    x = 257,663,944,008.02/586,579.89
  6. Step 6: Final answer
    x = 439,264.88

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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.