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Finding the Fourth Proportional to 385,146.80, 531,636.20 and 264,686.84

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Solution

The fourth proportional to 385,146.80, 531,636.20 and 264,686.84 is: 365,359.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,146.80 : 531,636.20 = 264,686.84 : x
  2. Step 2: Convert to fraction form
    385,146.80/531,636.20 = 264,686.84/x
  3. Step 3: Cross multiply
    385,146.80x = 531,636.20 × 264,686.84
  4. Step 4: Simplify right side
    385,146.80x = 140,717,105,807.61
  5. Step 5: Solve for x
    x = 140,717,105,807.61/385,146.80
  6. Step 6: Final answer
    x = 365,359.66

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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.