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Finding the Fourth Proportional to 586,401.46, 809,235.57 and 318,129.46

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Solution

The fourth proportional to 586,401.46, 809,235.57 and 318,129.46 is: 439,019.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,401.46 : 809,235.57 = 318,129.46 : x
  2. Step 2: Convert to fraction form
    586,401.46/809,235.57 = 318,129.46/x
  3. Step 3: Cross multiply
    586,401.46x = 809,235.57 × 318,129.46
  4. Step 4: Simplify right side
    586,401.46x = 257,441,674,896.89
  5. Step 5: Solve for x
    x = 257,441,674,896.89/586,401.46
  6. Step 6: Final answer
    x = 439,019.50

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1.5x scale

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.