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Finding the Fourth Proportional to 586,584.80, 809,487.03 and 318,312.80

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Solution

The fourth proportional to 586,584.80, 809,487.03 and 318,312.80 is: 439,271.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,584.80 : 809,487.03 = 318,312.80 : x
  2. Step 2: Convert to fraction form
    586,584.80/809,487.03 = 318,312.80/x
  3. Step 3: Cross multiply
    586,584.80x = 809,487.03 × 318,312.80
  4. Step 4: Simplify right side
    586,584.80x = 257,670,083,082.98
  5. Step 5: Solve for x
    x = 257,670,083,082.98/586,584.80
  6. Step 6: Final answer
    x = 439,271.67

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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.