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Finding the Fourth Proportional to 586,640.88, 809,564.49 and 318,368.88

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Solution

The fourth proportional to 586,640.88, 809,564.49 and 318,368.88 is: 439,349.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,640.88 : 809,564.49 = 318,368.88 : x
  2. Step 2: Convert to fraction form
    586,640.88/809,564.49 = 318,368.88/x
  3. Step 3: Cross multiply
    586,640.88x = 809,564.49 × 318,368.88
  4. Step 4: Simplify right side
    586,640.88x = 257,740,139,969.07
  5. Step 5: Solve for x
    x = 257,740,139,969.07/586,640.88
  6. Step 6: Final answer
    x = 439,349.10

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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.