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Finding the Fourth Proportional to 388,389.78, 535,901.16 and 245,345.94

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Solution

The fourth proportional to 388,389.78, 535,901.16 and 245,345.94 is: 338,528.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,389.78 : 535,901.16 = 245,345.94 : x
  2. Step 2: Convert to fraction form
    388,389.78/535,901.16 = 245,345.94/x
  3. Step 3: Cross multiply
    388,389.78x = 535,901.16 × 245,345.94
  4. Step 4: Simplify right side
    388,389.78x = 131,481,173,847.29
  5. Step 5: Solve for x
    x = 131,481,173,847.29/388,389.78
  6. Step 6: Final answer
    x = 338,528.92

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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.