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Finding the Fourth Proportional to 586,683, 809,622.60 and 318,411

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Solution

The fourth proportional to 586,683, 809,622.60 and 318,411 is: 439,407.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,683 : 809,622.60 = 318,411 : x
  2. Step 2: Convert to fraction form
    586,683/809,622.60 = 318,411/x
  3. Step 3: Cross multiply
    586,683x = 809,622.60 × 318,411
  4. Step 4: Simplify right side
    586,683x = 257,792,741,688.60
  5. Step 5: Solve for x
    x = 257,792,741,688.60/586,683
  6. Step 6: Final answer
    x = 439,407.21

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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.