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Finding the Fourth Proportional to 586,400.46, 809,234.19 and 318,128.46

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Solution

The fourth proportional to 586,400.46, 809,234.19 and 318,128.46 is: 439,018.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,400.46 : 809,234.19 = 318,128.46 : x
  2. Step 2: Convert to fraction form
    586,400.46/809,234.19 = 318,128.46/x
  3. Step 3: Cross multiply
    586,400.46x = 809,234.19 × 318,128.46
  4. Step 4: Simplify right side
    586,400.46x = 257,440,426,644.05
  5. Step 5: Solve for x
    x = 257,440,426,644.05/586,400.46
  6. Step 6: Final answer
    x = 439,018.12

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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.