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Finding the Fourth Proportional to 586,670, 809,604.60 and 318,398

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Solution

The fourth proportional to 586,670, 809,604.60 and 318,398 is: 439,389.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,670 : 809,604.60 = 318,398 : x
  2. Step 2: Convert to fraction form
    586,670/809,604.60 = 318,398/x
  3. Step 3: Cross multiply
    586,670x = 809,604.60 × 318,398
  4. Step 4: Simplify right side
    586,670x = 257,776,485,430.80
  5. Step 5: Solve for x
    x = 257,776,485,430.80/586,670
  6. Step 6: Final answer
    x = 439,389.24

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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.