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Finding the Fourth Proportional to 385,271, 531,673.98 and 251,135

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Solution

The fourth proportional to 385,271, 531,673.98 and 251,135 is: 346,566.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,271 : 531,673.98 = 251,135 : x
  2. Step 2: Convert to fraction form
    385,271/531,673.98 = 251,135/x
  3. Step 3: Cross multiply
    385,271x = 531,673.98 × 251,135
  4. Step 4: Simplify right side
    385,271x = 133,521,944,967.30
  5. Step 5: Solve for x
    x = 133,521,944,967.30/385,271
  6. Step 6: Final answer
    x = 346,566.30

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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.