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Finding the Fourth Proportional to 586,990, 810,049.44 and 318,718

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Solution

The fourth proportional to 586,990, 810,049.44 and 318,718 is: 439,832.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,990 : 810,049.44 = 318,718 : x
  2. Step 2: Convert to fraction form
    586,990/810,049.44 = 318,718/x
  3. Step 3: Cross multiply
    586,990x = 810,049.44 × 318,718
  4. Step 4: Simplify right side
    586,990x = 258,177,337,417.92
  5. Step 5: Solve for x
    x = 258,177,337,417.92/586,990
  6. Step 6: Final answer
    x = 439,832.60

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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.